Number 13 facts

The odd number 13 is spelled 🔊, and written in words: thirteen. The ordinal number 13rd is said 🔊 and written as: thirteenth. The meaning of the number 13 in Maths: Is it Prime? Factorization and prime factors tree. The square root and cube root of 13. What is 13 in computer science, numerology, codes and images, writing and naming in other languages. Other interesting facts, news related to 13.

What is 13 in other units

The decimal (Arabic) number 13 converted to a Roman number is XIII. Roman and decimal number conversions.
 The number 13 converted to a Mayan number is Decimal and Mayan number conversions.

Weight conversion

13 kilograms (kg) = 28.7 pounds (lbs)
13 pounds (lbs) = 5.9 kilograms (kg)

Length conversion

13 kilometers (km) equals to 8.078 miles (mi).
13 miles (mi) equals to 20.921 kilometers (km).
13 meters (m) equals to 20.921 feet (ft).
13 feet (ft) equals 3.962 meters (m).
13 centimeters (cm) equals to 5.1 inches (in).
13 inches (in) equals to 33.0 centimeters (cm).

Temperature conversion

13° Fahrenheit (°F) equals to -10.6° Celsius (°C)
13° Celsius (°C) equals to 55.4° Fahrenheit (°F)

Power conversion

13 Horsepower (hp) equals to 9.56 kilowatts (kW)
13 kilowatts (kW) equals to 17.68 horsepower (hp)

Codes and images of the number 13

Number 13 morse code: .---- ...--
Sign language for number 13:

Number 13 in braille:
Images of the number
Image (1) of the numberImage (2) of the number
More images, other sizes, codes and colors ...

Photo of number 13

• Tiberius made his triumphant procession through Rome after siege of Germany.
• The year 13 AD was the last year of shijianguo era of the Chinese Xin Dynasty.

Gregorian, Hebrew, Islamic, Persian and Buddhist Year (Calendar)

Gregorian year 13 is Buddhist year 556.
Buddhist year 13 is Gregorian year 530 a. C.
Gregorian year 13 is Islamic year -628 or -627.
Islamic year 13 is Gregorian year 634 or 635.
Gregorian year 13 is Persian year -610 or -609.
Persian year 13 is Gregorian 634 or 635.
Gregorian year 13 is Hebrew year 3773 or 3774.
Hebrew year 13 is Gregorian year 3747 a. C.
The Buddhist calendar is used in Sri Lanka, Cambodia, Laos, Thailand, and Burma. The Persian calendar is the official calendar in Iran and Afghanistan.

Mathematics of no. 13

Multiplications

Multiplication table of 13

13 multiplied by two equals 26 (13 x 2 = 26).
13 multiplied by three equals 39 (13 x 3 = 39).
13 multiplied by four equals 52 (13 x 4 = 52).
13 multiplied by five equals 65 (13 x 5 = 65).
13 multiplied by six equals 78 (13 x 6 = 78).
13 multiplied by seven equals 91 (13 x 7 = 91).
13 multiplied by eight equals 104 (13 x 8 = 104).
13 multiplied by nine equals 117 (13 x 9 = 117).
show multiplications by 6, 7, 8, 9 ...

Fractions: decimal fraction and common fraction

Fraction table of 13

Half of 13 is 6,5 (13 / 2 = 6,5 = 6 1/2).
One third of 13 is 4,3333 (13 / 3 = 4,3333 = 4 1/3).
One quarter of 13 is 3,25 (13 / 4 = 3,25 = 3 1/4).
One fifth of 13 is 2,6 (13 / 5 = 2,6 = 2 3/5).
One sixth of 13 is 2,1667 (13 / 6 = 2,1667 = 2 1/6).
One seventh of 13 is 1,8571 (13 / 7 = 1,8571 = 1 6/7).
One eighth of 13 is 1,625 (13 / 8 = 1,625 = 1 5/8).
One ninth of 13 is 1,4444 (13 / 9 = 1,4444 = 1 4/9).
show fractions by 6, 7, 8, 9 ...

Calculator

 13

Is Prime?

The number 13 is a prime number. The closest prime numbers are 11, 17.
The 13rd prime number in order is 41.

Factorization and factors (dividers)

The prime factors of 13
Prime numbers have no prime factors smaller than themselves.
The factors of 13 are 1, 13.
Total factors 2.
Sum of factors 14 (1).

Prime factor tree

13 is a prime number.

Powers

The second power of 132 is 169.
The third power of 133 is 2.197.

Roots

The square root √13 is 3,605551.
The cube root of 313 is 2,351335.

Logarithms

The natural logarithm of No. ln 13 = loge 13 = 2,564949.
The logarithm to base 10 of No. log10 13 = 1,113943.
The Napierian logarithm of No. log1/e 13 = -2,564949.

Trigonometric functions

The cosine of 13 is 0,907447.
The sine of 13 is 0,420167.
The tangent of 13 is 0,463021.

Properties of the number 13

More math properties ...

Number 13 in Computer Science

Code typeCode value
Port 13/TCP, UDPDAYTIME protocol
Unix timeUnix time 13 is equal to Thursday Jan. 1, 1970, 12:13 a.m. GMT
IPv4, IPv6Number 13 internet address in dotted format v4 0.0.0.13, v6 ::d
13 Decimal = 1101 Binary
13 Decimal = 111 Ternary
13 Decimal = 15 Octal
13 Decimal = D Hexadecimal (0xd hex)
13 BASE64MTM=
13 MD5c51ce410c124a10e0db5e4b97fc2af39
13 SHA1bd307a3ec329e10a2cff8fb87480823da114f8f4
13 SHA22486730f0dd6381286d3b5f0dfb897ce4895480ce97564c6be4f1543b8
13 SHA2563fdba35f04dc8c462986c992bcf875546257113072a909c162f7e470e581e278
13 SHA3846356fbb43627033e886785c2a9c16980336df008b720d23f98b35e06ee69246287739c9d7458b39356c3bdb1e4e2c7fc
More SHA codes related to the number 13 ...

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Numerology 13

Numerology number 13: what does it mean spiritually?

The combined energy of number 1 and number 3 is represented by the number 13. There is a lot of symbolism behind this number and it carries a lot of power.

This number can be interpreted as the expression of our renewed passion and motivation since it combines these two energies. Tradition, planning, judgment, and effort are also associated with it.

It is usually very traditional, very organized, and very hard working to be a person with the number 13. Positive traits are being developed in these people through their negative attributes. For them to reach spiritual awareness, many trials and temptations are required.

The meaning of the number 3 (three), numerology 3

Character frequency 3: 1

The number three (3) came to share genuine expression and sensitivity with the world. People associated with this number need to connect with their deepest emotions. The number 3 is characterized by its pragmatism, it is utilitarian, sagacious, dynamic, creative, it has objectives and it fulfills them. He/she is also self-expressive in many ways and with good communication skills.
More about the the number 3 (three), numerology 3 ...

The meaning of the number 1 (one), numerology 1

Character frequency 1: 1

Number one (1) came to develop or balance creativity, independence, originality, self-reliance and confidence in the world. It reflects power, creative strength, quick mind, drive and ambition. It is the sign of individualistic and aggressive nature.
More about the the number 1 (one), numerology 1 ...

Interesting facts about the number 13

Areas, mountains and surfaces

• The total area of Java is 53,589 square miles (138,794 square km). Country Indonesia (Banten, Jakarta, Yogyakarta and Central, East and West Java). 13th largest island in the world.
• The total area of United States Minor Outlying Islands is 2,687.04 square miles (6,959.41 km²) and the water area is 2,678 square miles (6,937 km²) and the land area is 13.2 square miles (34.2 km²).

Astronomy and space

• (13) Egeria is asteroid number 13. Was discovered by A. de Gasparis from Obs. Astronómico de Capodimonte 11/2/1850.
• Apollo 13 was a NASA Moon mission famous for being a 'successful failure' in 1970.

Distances between cities

• There is a 13 miles (20 km) direct distance between Abū Ghurayb (Iraq) and Baghdad (Iraq).
• There is a 13 miles (20 km) direct distance between Álvaro Obregón (Mexico) and Ciudad Nezahualcoyotl (Mexico).
• There is a 13 miles (20 km) direct distance between Delhi (India) and Ghāziābād (India).
• There is a 13 miles (20 km) direct distance between Depok (Indonesia) and Jakarta (Indonesia).
• More distances between cities ...

Games

• Pokémon Weedle (Bīdoru, Beedle) is a Pokémon number # 013 of the National Pokédex. Weedle is a bug and poison type Pokémon in the first generation. It is a Pokémon from the Bug Egg group. The indexes ontros of Weedle are Kalos Center index 026 - Pokédex of the Central Zone, Johto index 027 .

History and politics

• United Nations Security Council Resolution number 13, adopted 12 December 1946. Admission of Siam (Thailand). Resolution text.

In other fields

• Unreasoned fear of the number 13 is termed triskaidekaphobia
• On average a person laughs 13 times in a day.
• Symbol of Hate: The number 13 is a numerical symbol of the Aryan Circle, the great racist prison gang based in Texas. Substitute letters for numbers, 1 and 3 equals A and C, that is, AC or Aryan Circle. The list of evil numbers.
• Dreaming of the number 13 means transformation to the new, much higher and spiritual being.

Mathematics

• 13 is the 3rd centered square number

Example of 4th centered square number with 25 dots.
• 13 is the smallest prime which is not a minimal prime
• 13 is the smallest prime which can be represented as sum of two primes (i.e., 2 + 11) as well as sum of two composite numbers (i.e., 9 + 4)
• 13 is the number of times in one century when the date in the format month day and the last two digits of the year can be written with the same digit
• 13 is the number of intersections of diagonals inside a regular hexagon
• 13 is the number of Archimedean solids.
• More mathematics ...

Religions

• 13 were the diners of the Last Supper of Christ
• The apparitions of the Virgin of Fatima in 1917 were claimed to occur on the 13th of six consecutive months.
• In Judaism, 13 signifies the age when a boy matures and becomes a Bar Mitzvah, that is, a full member of the Jewish faith.

Science

• Aluminium is the chemical element in the periodic table that has the symbol Al and atomic number 13.

Sports

• Ángel Nieto Roldán was a Spanish motorcycling pilot, world speed champion 13 times.
• The best athletes to wear number 13
Wilt Chamberlain, NBA; Dan Marino, NFL; Alex Rodriguez, MLB; Steve Nash, NBA; James Harden, NBA

Superstitions

• For Spain and Latin America, Tuesday the 13th is bad luck. For France and English-speaking countries it is Friday the 13th.
• The number 13 in Japan is considered bad for a purely mathematical reason, since it is the sum of 9 and 4.

Tv, movies and cinematography

• Film: 13 Rue Madeleine (13 Rue Madeleine) Year: 1946 Length: 92 Director: Henry Hathaway Featuring: James Cagney; Annabella
• Film: 13 Tzameti (13 Tzameti) Year: 2005 Duration: 95 Director: Géla Babluani With: George Babluani; Pascal Bongard
• Apollo 13 is a 1995 American film that recounts the problems of the failed Apollo 13 lunar mission. The film is a free adaptation of the novel Lost Moon, written by Jim Lovell (the Apollo 13 mission commander) and Jeffrey Kluger.

№ 13 in other languages

How to say or write the number thirteen in Spanish, German, French and other languages.
 Spanish: 🔊 (número 13) trece German: 🔊 (Nummer 13) dreizehn French: 🔊 (nombre 13) treize Portuguese: 🔊 (número 13) treze Hindi: 🔊 (संख्या 13) तेरह Chinese: 🔊 (数 13) 十三 Arabian: 🔊 (عدد 13) ثلاثة عشر Czech: 🔊 (číslo 13) třináct Korean: 🔊 (번호 13) 십삼 Danish: 🔊 (nummer 13) tretten Hebrew: (מספר 13) שלש עשרה Dutch: 🔊 (nummer 13) dertien Japanese: 🔊 (数 13) 十三 Indonesian: 🔊 (jumlah 13) tiga belas Italian: 🔊 (numero 13) tredici Norwegian: 🔊 (nummer 13) tretten Polish: 🔊 (liczba 13) trzynaście Russian: 🔊 (номер 13) тринадцать Turkish: 🔊 (numara 13) onüç Thai: 🔊 (จำนวน 13) สิบสาม Ukrainian: 🔊 (номер 13) тринадцять Vietnamese: 🔊 (con số 13) mười ba Other languages ...

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Frequently asked questions about the number 13

• Is 13 prime and why?

The number 13 is a prime number because its divisors are: 1, 13.

• How do you write the number 13 in words?

13 can be written as "thirteen".

Number 13 in News

 France24: At least 13 dead after university shooting in central Prague A lone gunman opened fire Thursday in a university building in downtown Prague, killing at least 13 people and wounding more than 20 in the Czech Republic’s worst-ever mass shooting, police said. Dec. 21, 2023 NyTimes: Explosion Near Al Shifa Hospital in Gaza Kills 13 and Injures Many Others The Israeli military said it targeted an ambulance “being used by a Hamas terrorist cell.” At the time, Palestinians said, a convoy of ambulances was preparing to take wounded people to the Gaza border. Nov. 4, 2023 BBC: Hamas officials say 13 killed in blast outside Gaza City's Al-Shifa hospital Israel said it hit an ambulance it said was carrying Hamas operatives without specifying where. Nov. 3, 2023 France24: Astronaut Thomas K. Mattingly, who helped save Apollo 13, dies aged 87 A NASA astronaut who was removed from the ill-fated Apollo 13 mission but helped bring its crew back home safely thanks to his problem-solving efforts from ground control has died at the age of 87. Nov. 3, 2023 BBC: A slave at 13 - but how did a Ghanaian man end up changing UK history? Quobna Cugoano was captured by slavers aged 13 but later played a big part in the UK abolition movement. Sept. 20, 2023