Number 13
Number 13 spell 🔊, write in words: thirteen . Ordinal number 13th is said 🔊 and write: thirteenth. The meaning of number 13 in Maths: Is Prime? Factorization and dividers. The square root and cube root of 13. The meaning in computer science, numerology, codes and images, writing and naming in other languages, other interesting facts, news.
Useful information about number 13
The number 13 converted to a Mayan number is  
Decimal and Mayan number conversions. 
Weight conversion
13 kilograms (kg) = 28.7 pounds (lb)
13 pounds (lb) = 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:
Images of the number  
Image (1) of the number  Image (2) of the number 
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Number 13 infographic.

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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 official in Iran and Afghanistan.
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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 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).
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 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).
Calculator
13  
Advanced math operations
Is Prime?
The number 13 is a prime number. The closest prime numbers are 11, 17.
13th prime number in order is 41.
Factorization and dividers
Factorization 13 = 13
Divisors of number 13 are 1 , 13
Total Divisors 2.
Sum of Divisors 14.
Powers
The second power of 13^{2} is 169.
The third power of 13^{3} is 2.197.
Roots
The square root √13 is 3,605551.
The cube root of ^{3}√13 is 2,351335.
Logarithms
The natural logarithm of No. ln 13 = log_{e} 13 = 2,564949.
The logarithm to base 10 of No. log_{10} 13 = 1,113943.
The Napierian logarithm of No. log_{1/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
Is a Friedman number: NoIs a Fibonacci number: Yes
Is a Bell number: No
Is a palindromic number: No
Is a pentagonal number: No
Is a perfect number: No
Number 13 in Computer Science
Code type  Code value 

Port 13/TCP, UDP  DAYTIME protocol 
Unix time  Unix time 13 is equal to Thursday Jan. 1, 1970, 12:13 a.m. GMT 
IPv4, IPv6  Number 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 BASE64  MTM= 
13 MD5  c51ce410c124a10e0db5e4b97fc2af39 
13 SHA1  bd307a3ec329e10a2cff8fb87480823da114f8f4 
13 SHA224  86730f0dd6381286d3b5f0dfb897ce4895480ce97564c6be4f1543b8 
13 SHA256  3fdba35f04dc8c462986c992bcf875546257113072a909c162f7e470e581e278 
13 SHA384  6356fbb43627033e886785c2a9c16980336df008b720d23f98b35e06ee69246287739c9d7458b39356c3bdb1e4e2c7fc 
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If you know something interesting about the 13 number that you did not find on this page, do not hesitate to write us here.
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.
Read more ...The meaning of the number 3 (three), numerology 3
Character frequency 3: 1
The meaning of the number 1 (one), numerology 1
Character frequency 1: 1
Interesting facts about the number 13
Areas, mountains and surfaces
 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).
 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.
Astrology
 It is one of the lucky numbers for the zodiac sign Scorpio.
 What is astrology and what is it for?
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).
Games
In other fields
 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 number of Archimedean solids.
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
 The best athletes to wear number 13
Wilt Chamberlain, NBA; Dan Marino, NFL; Alex Rodriguez, MLB; Steve Nash, NBA; James Harden, NBA  Ángel Nieto Roldán was a Spanish motorcycling pilot, world speed champion 13 times.
Superstitions
 For Spain and Latin America, Tuesday the 13th is bad luck. For France and Englishspeaking 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.
Please write us
If you know something interesting about the number 13 or any natural number (positive integer), please write to us.Number 13 in other languages
Spanish:  🔊 (número 13)  trece 
German:  🔊 (Anzahl 13)  dreizehn 
French:  🔊 (nombre 13)  treize 
Portuguese:  🔊 (número 13)  treze 
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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Number 13 in News
Buzz: This Lawmaker Wants To Label Foreign White Supremacist Groups As "Terrorists," But Some Of Them No Longer Exist
Of the 13 violent farright extremist groups Rep. Elissa Slotkin wants the US to designate "foreign terrorist organizations," four are defunct, one is American, and another is a part of an allied nation’s national guard.View Entire Post › ... April 15, 2021 
Buzz: A Scientist Tracked Down Chinese Coronavirus Sequences That Had Disappeared Online
“I think it's certainly consistent with an attempt to hide the sequences,” said the researcher, whose internet sleuthing has uncovered 13 genetic sequences from early in the outbreak in Wuhan, China.View Entire Post › ... June 24, 2021 
Buzz: These Photos Show The Devastating Aftermath Of The Deadly Kabul Airport Attack
At least 13 US service members and an unknown number of Afghan civilians were killed in an explosion at an already chaotic airport.View Entire Post › ... Aug. 27, 2021 
CNN: Guns N' Roses release their first new song in 13 years
Guns N' Roses fans are finally getting treated to new music after 13 years. Aug. 7, 2021 
NyTimes: Colombia Names 13 ExSoldiers Among Haiti Assassination Suspects
One told his wife as he left home that he had “a very good job opportunity.” Colombian military veterans have been known to act as hired guns following their service. July 9, 2021 