Number 7

Number 7 spell 🔊, write in words: seven . Ordinal number 7th is said 🔊 and write: seventh. Phone prefix +7 or 007. The meaning of number 7 in Maths: Is Prime? Factorization and dividers. The square root and cube root of 7. The meaning in computer science, numerology, codes and images, writing and naming in other languages , other interesting facts, news.

Useful information about number 7

The decimal (Arabic) number 7 converted to a Roman number is VII. Roman and decimal number conversions.
The number 7 converted to a Mayan number is mayan number 7
Decimal and Mayan number conversions.

Weight conversion

7 kilograms (kg) = 15.4 pounds (lb)
7 pounds (lb) = 3.2 kilograms (kg)

Length conversion

7 kilometers (km) equals to 4.350 miles (mi).
7 miles (mi) equals to 11.265 kilometers (km).
7 meters (m) equals to 11.265 feet (ft).
7 feet (ft) equals 2.134 meters (m).
7 centimeters (cm) equals to 2.8 inches (in).
7 inches (in) equals to 17.8 centimeters (cm).

Temperature conversion

7° Fahrenheit (°F) equals to -13.9° Celsius (°C)
7° Celsius (°C) equals to 44.6° Fahrenheit (°F)

Power conversion

7 Horsepower (hp) equals to 5.15 kilowatts (kW)
7 kilowatts (kW) equals to 9.52 horsepower (hp)

Codes and images of the number 7

Number 7 morse code: --...
Sign language for number 7: Sign language for number 7
Images of the number
Image (1) of the numberImage (2) of the number
Number 7 black image Number 7 red image
More images, other sizes, codes and colors ...

Number 7 infographic

Photo of number 7

Photo of the number 7

Gregorian, Hebrew, Islamic, Persian and Buddhist year (calendar)

Gregorian year 7 is Buddhist year 550.
Buddhist year 7 is Gregorian year 536 a. C.
Gregorian year 7 is Islamic year -634 or -633.
Islamic year 7 is Gregorian year 628 or 629.
Gregorian year 7 is Persian year -616 or -615.
Persian year 7 is Gregorian 628 or 629.
Gregorian year 7 is Hebrew year 3767 or 3768.
Hebrew year 7 is Gregorian year 3753 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. 7


Multiplication table of 7

7 multiplied by two equals 14 (7 x 2 = 14).
7 multiplied by three equals 21 (7 x 3 = 21).
7 multiplied by four equals 28 (7 x 4 = 28).
7 multiplied by five equals 35 (7 x 5 = 35).
7 multiplied by six equals 42 (7 x 6 = 42).
7 multiplied by seven equals 49 (7 x 7 = 49).
7 multiplied by eight equals 56 (7 x 8 = 56).
7 multiplied by nine equals 63 (7 x 9 = 63).
show multiplications by 6, 7, 8, 9 ...

Fractions: decimal fraction and common fraction

Fraction table of 7

Half of 7 is 3,5 (7 / 2 = 3,5 = 3 1/2).
One third of 7 is 2,3333 (7 / 3 = 2,3333 = 2 1/3).
One quarter of 7 is 1,75 (7 / 4 = 1,75 = 1 3/4).
One fifth of 7 is 1,4 (7 / 5 = 1,4 = 1 2/5).
One sixth of 7 is 1,1667 (7 / 6 = 1,1667 = 1 1/6).
One seventh of 7 is 1 (7 / 7 = 1).
One eighth of 7 is 0,875 (7 / 8 = 0,875 = 7/8).
One ninth of 7 is 0,7778 (7 / 9 = 0,7778 = 7/9).
show fractions by 6, 7, 8, 9 ...



Advanced math operations

Is Prime?

The number 7 is a prime number. The closest prime numbers are 5, 11.
7th prime number in order is 17.

Factorization and dividers

Factorization 7 = 7
Divisors of number 7 are 1 , 7
Total Divisors 2.
Sum of Divisors 8.


The second power of 72 is 49.
The third power of 73 is 343.


The square root √7 is 2,645751.
The cube root of 37 is 1,912931.


The natural logarithm of No. ln 7 = loge 7 = 1,94591.
The logarithm to base 10 of No. log10 7 = 0,845098.
The Napierian logarithm of No. log1/e 7 = -1,94591.

Trigonometric functions

The cosine of 7 is 0,753902.
The sine of 7 is 0,656987.
The tangent of 7 is 0,871448.

Properties of the number 7

Is a Friedman number: No
Is a Fibonacci number: No
Is a Bell number: No
Is a palindromic number: No
Is a pentagonal number: No
Is a perfect number: No

Number 7 in Computer Science

Code typeCode value
Port 7/TCP, UDPECHO protocol
Unix timeUnix time 7 is equal to Thursday Jan. 1, 1970, 12:07 a.m. GMT
IPv4, IPv6Number 7 internet address in dotted format v4, v6 ::7
7 Decimal = 111 Binary
7 Decimal = 21 Ternary
7 Decimal = 7 Octal
7 Decimal = 7 Hexadecimal (0x7 hex)
7 BASE64Nw==
7 MD58f14e45fceea167a5a36dedd4bea2543
7 SHA1902ba3cda1883801594b6e1b452790cc53948fda
7 SHA22456929c1607626a1edbdaafb9c7f10c247e54fcbb20f1e3260f783011
7 SHA2567902699be42c8a8e46fbbb4501726517e86b22c56a189f7625a6da49081b2451
7 SHA384c2b14cbf3fcb739683383b96157f765c8629dd2415ceb3b277b5f6028e8bb3c8cc5408be8a88254907c6ebb1cd4f1827
More SHA codes related to the number 7 ...

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Numerology 7

The number 7 (seven) is the sign of the intellect, thought, psychic analysis, idealism and wisdom. This number first needs to gain self-confidence and to open his/her life and heart to experience trust and openness in the world. And then you can develop or balance the aspects of reflection, meditation, seeking knowledge and knowing.

The number seven (7) represents the protective figure that offers security in the family. He/she is noble, altruistic and kind to achieve his/her goal. They are study-loving people, tending to project their life into a sphere of idealism and intellectual activity. They have skills for analysis, research and the intelligent pursuit of knowledge. They also have a scientific mind with inventiveness; studious and meditative. The 7 has an excellent sense of adaptation, so it is not very difficult for him/her to adapt to unforeseen events and new situations that arise.

In the social aspect, despite being a charming person, he/she can be very reserved. Number 7 personality is a lover of solitude and peace. The 7 highly values ​​courage and cannot stand the weak, fearful of facing struggles. He/she can offer help to those who fight and are defeated, but he/she will never do the same with those who surrender without fighting. Read more ...

Interesting facts about the number 7

Aircrafts and flights

  • 09/01/1983 the Korean Air Lines plane, flight number 007, Boeing 747-230B crashed in Sea of Japan, near Moneron Island, Soviet Union 246 passengers and 23 crew members died.
  • 06/03/1962 the Air France plane, flight number 007, Boeing 707-328 crashed in Paris, France 122 passengers and 8 crew members died.
  • 03/14/1980 the LOT Polish Airlines plane, flight number 007, Ilyushin Il-62 crashed in Warsaw, Poland 77 passengers and 10 crew members died.

Areas, mountains and surfaces

  • The total area of Honshu is 87,200 square miles (225,800 square km). Country Japan (Chūbu, Chūgoku, Kansai, Kantō and Tōhoku regions). 7th largest island in the world.


Astronomy and space

  • (7) Iris is asteroid number 7. Was discovered by J. R. Hind from Observatorio George Bishop, 8/13/1847.
  • '7 Andromedae' is a star in the constellation Andromeda of apparent magnitude +4.54. It is 80 light years distant from the Solar System.


  • Pokémon Squirtle (Zenigame) is a Pokémon number # 007 of the National Pokédex. Squirtle is a water-type Pokémon in the first generation. It is a Pokémon from the Monster Egg and Water 1 group. Squirtle's other indexes are Kalos Centro index 086 - Central Zone Pokédex, Johto index 232 .

History and politics

  • United Nations Security Council Resolution number 7, adopted 26 June 1946. Condemning Francoist Spain, continued monitoring of the situation. Resolution text.

In other fields

  • A week has 7 days.
  • There are 7 musical notes.
  • It is estimated that globally in the world there is always at least 7% of the population that is drunk.
  • In China there are seven cardinal points (with the center, up and down).


  • 7 is the smallest number of sides of a regular polygon that is not constructible by straightedge and compass.

Mobile and telephony

  • Number 7 or +7 or 007 is a dial the international call prefix for Kazakhstan. (00/+) is dial the international call prefix.
  • Number 7 or +7 or 007 is a dial the international call prefix for Russian Federation. (00/+) is dial the international call prefix.


  • '7' is a song by Prince and The New Power Generation, from the 1992 Album Love Symbol. '7' is also a song by the Welsh indie rock band 'Catfish and the Bottlemen'.
  • '7 Words', in spanish '7 Palabras', is a single by the alternative metal band, Deftones.
  • '7 Seconds' is a song composed by Youssou N'Dour, Neneh Cherry, Cameron McVey and Jonathan Sharp. He was very successful, reaching the top chart position in numerous countries.
  • '7 Years', in Spanish '7 aňos', is the lead single by the Australian metal band Superheist. '7 Years' is also a song by the Danish soul-pop band Lukas Graham.
  • '7 Weeks', in Spanish '7 weeks', is the sixth single by the alternative rock band from Essex, InMe.
  • '7 Days to the Wolves', in Spanish '7 days to the wolves', is a song by the Finnish symphonic metal band Nightwish.
  • '7 Things', in Spanish '7 things', is a song by the American singer and actress Miley Cyrus.
  • '7 Days and 7 Nights', in Spanish '7 days and 7 nights', is a song written by Brolle (Kjell Junior Wallmark).
  • '7 Skies H3' is a composition by the American experimental rock band The Flaming Lips.
  • '7 Aurelius' is an R&B (rhythm and blues) singer.
  • '7 Min Freestyle' is a song by American rapper 21 Savage.


  • There are 7 deadly sins.
  • The Bible uses the 7 to indicate perfection, and it is the sign of God, divine worship, completions, obedience, and rest. The number seven is used 562 times in the Bible, including its derivatives (eg, seventh, sevens).
  • In the Bible there are Seven Sacraments and the seven gifts of the Holy Spirit. Noah carried the cleaned animals into the Ark in sets of 7 pairs for each species.
  • The number seven is also the most common in biblical prophecy, occurring 42 times in Daniel and Revelation. In the Apocalypse there are seven churches, seven spirits, seven golden candlesticks, seven stars, seven lamps, seven seals, seven horns, seven eyes, the seven angels, seven trumpets, seven thunders, seven thousand killed in a great earthquake, seven heads , seven crowns, seven last plagues, seven golden bowls, seven mountains and seven kings.


  • Nitrogen is the chemical element in the periodic table that has the symbol N and atomic number 7.


  • The best athletes to wear number 7
    Mickey Mantle, MLB; John Elway, NFL; David Beckham, fútbol; Tiny Archibald, NBA; Phil Esposito, NHL

Tv, movies and cinematography

  • '7 Day Weekend' is a 1992 song by Grace Jones for the soundtrack of the Eddie Murphy film Boomerang, in which Jones played the character of Helen Strangé.
  • '7 Years' (French: 7 ans) is a 2006 French drama film starring Bruno Todeschini, Valerie Donzelli and Cyril Troley. It is written and directed by Jean-Pascal Hattu.
  • 'Seven Years in Tibet' (original title 'Seven Years in Tibet'), is an American film of the dramatic genre shot in 1997. Based on the 1953 book by Austrian mountaineer Heinrich Harrer, in which the experiences of H Harrer in Tibet between 1944 (World War II) and 1950 (entry of the Chinese People's Liberation Army). It was directed by Jean-Jacques Annaud and featured performances by Brad Pitt and David Thewlis.
  • Saliut 7 (Salyut-7: Heroes in Space) is a 2017 Russian drama film shot by director Klim Shypenko and based on the script by Natalia Merkulova. The film premiered on September 21, 2017 in the United States, on October 11, 2017 at the Sitges Film Festival and on October 12, 2017 in Russia. The main roles were played by Vladimir Vdovichenkov and Pavel Derevyanko.

Number 7 in other languages

How to say or write the number seven in Spanish, German, French and other languages.
Spanish: 🔊 (número 7)


German: 🔊 (Anzahl 7)


French: 🔊 (nombre 7)


Portuguese: 🔊 (número 7)


Chinese: 🔊 (数 7)

Arabian: 🔊 (عدد 7)


Czech: 🔊 (číslo 7)


Korean: 🔊 (번호 7)

Danish: 🔊 (nummer 7)


Hebrew: (מספר 7)


Dutch: 🔊 (nummer 7)


Japanese: 🔊 (数 7)

Indonesian: 🔊 (jumlah 7)


Italian: 🔊 (numero 7)


Norwegian: 🔊 (nummer 7)


Polish: 🔊 (liczba 7)


Russian: 🔊 (номер 7)


Turkish: 🔊 (numara 7)


Thai: 🔊 (จำนวน 7)


Ukrainian: 🔊 (номер 7)


Vietnamese: 🔊 (con số 7)


Other languages ...

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Number 7 in News

BBC: Rising fuel costs drive UK inflation to 0.7 in March
The cost of living rose to 0.7% in March, from 0.4% in February, as fuel, transport and clothes prices increased.
April 21, 2021

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