83 (number)
Encyclopedia : 8 : 83 : 83N : 83 (number)
83 (eighty-three) is the natural number following 82 and preceding 84.
| Cardinal | 83 eighty-three |
| Ordinal | 83rd eighty-third |
| Factorization | [prime] |
| Roman numeral | LXXXIII |
| Binary | 01010011 |
| Hexadecimal | 53 |
In mathematics
Eighty-three is the sum of three consecutive primes (23 + 29 + 31) as well as the sum of five consecutive primes (11 + 13 + 17 + 19 + 23).It is also the 23rd prime number, following 79 and preceding 89. 83 is a Sophie Germain prime and a safe prime, and also a Chen prime. It is an Eisenstein prime with no imaginary part and real part of the form [3n - 1].
It is also a highly cototient number.
In 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
- The Saros number of the solar eclipse series which began on -210 May 5 and ended on 1052 May 30. The duration of Saros series 83 was 1262.1 years, and it contained 71 solar eclipses. The Saros number of the lunar eclipse series which began on -197 August 22 and ended on 1318 February 16. The duration of Saros series 83 was 1514.5 years, and it contained 85 lunar eclipses.
In other fields
Eighty-three is also:- The atomic number of bismuth.
- the hours in 83 Hours 'Til Dawn
- the model number of Bell XP-83
- the number of the French department Var
- the designation of Interstate 83, a freeway that runs from Maryland to Pennsylvania; European route E83 from Bjala to Sofia
- The ISBN Group Identifier for books published in Poland
- The year AD 83, 83 BC, or 1983.
- 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 USA being re-assigned to cellular phone service there in the late 1970s-early 1980s).
- 83 is a song written by John Mayer in the Room for Squares album.
- M83 - French Indie Band
- No stable isotope of any element has an atomic number of 83.
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