| ||||
---|---|---|---|---|

Cardinal | eighty-three | |||

Ordinal | 83rd (eighty-third) | |||

Factorization | prime | |||

Prime | 23rd | |||

Divisors | 1, 83 | |||

Greek numeral | ΠΓ´ | |||

Roman numeral | LXXXIII | |||

Binary | 1010011_{2} | |||

Ternary | 10002_{3} | |||

Quaternary | 1103_{4} | |||

Quinary | 313_{5} | |||

Senary | 215_{6} | |||

Octal | 123_{8} | |||

Duodecimal | 6B_{12} | |||

Hexadecimal | 53_{16} | |||

Vigesimal | 43_{20} | |||

Base 36 | 2B_{36} |

**83** (**eighty-three**) is the natural number following 82 and preceding 84.

## Contents

## In mathematics

**83** is:

- the sum of three consecutive primes (23 + 29 + 31).
- the sum of five consecutive primes (11 + 13 + 17 + 19 + 23).
- the 23rd prime number, following 79 (of which it is also a cousin prime) and preceding 89.
- a Sophie Germain prime.
^{[1]} - a safe prime.
^{[2]} - a Chen prime.
^{[3]} - an Eisenstein prime with no imaginary part and real part of the form 3
*n*− 1. - a highly cototient number.
^{[4]}

## In science

### Chemistry

- The atomic number of bismuth (Bi)

### Astronomy

- Messier object M83, a magnitude 8.5 spiral galaxy in the constellation Hydra, also known as the Southern Pinwheel Galaxy
- The New General Catalogue object NGC 83, a magnitude 12.3 elliptical galaxy in the constellation Andromeda

## In religion

### Judaism

- When someone reaches 83 they may celebrate a second bar mitzvah

## In music

- M83 is the debut album of the French electronic music group M83
- 83 is a song written by John Mayer in the
*Room for Squares*album. - 83 is a Quebec hip-hop group
^{[citation needed]} - 83 is a song produced by Maximono
^{[citation needed]}

## In film and television

- Gypsy 83 is 2001 film directed by Todd Stephens
- Class of '83 is 2004 film directed by Kurt E. Soderling
- 83 Hours 'Til Dawn is a 1990 film directed by Donald Wrye
- 83 is the highest UHF channel on older televisions made before the late 1970s (newer televisions only go up to channel 69, due to the frequency spectrum previously assigned to channels 70-83 in the United States being reassigned to cellular phone service there in the late 1970s-early 1980s). As an example, the television station CIVIC-TV managed by the James Woods character Max Renn in the 1983 film
*Videodrome*was on Channel 83.

## In other fields

**Eighty-three** is also:

- The year AD
**83**, 83 BC, or 1983 - The TI-83 series, graphing calculators from Texas Instruments
- Konsept83 is a Greek graphic design team.
- The model number of Bell XP-83
- The number of the French department Var
- The ISBN Group Identifier for books published in Poland
- The eighth letter of the alphabet is H and the third letter is C, thus 83 stands for "Heil Christ," a greeting sometimes (not always) used by racist organizations that consider themselves also to be Christian.
^{[5]}This symbology is also known to be used by many non-racist (though certainly religion-biased)^{[5]}Christians and non-denominational Churches. - An emoticon based on :3 with wide-open eyes.

## References

**^**"Sloane's A005384 : Sophie Germain primes".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-29.**^**"Sloane's A005385 : Safe primes".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-29.**^**"Sloane's A109611 : Chen primes".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-29.**^**"Sloane's A100827 : Highly cototient numbers".*The On-Line Encyclopedia of Integer Sequences*. OEIS Foundation. Retrieved 2016-05-29.- ^
^{a}^{b}Hate Number Symbols: 83 - From A Visual Database of Extremist Symbols, Logos and Tattoos