83 (number)

From Wikipedia, the free encyclopedia

83	80	3

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

← 80 81 82 83 84 85 86 87 88 89 → List of numbers — Integers 0 10 20 30 40 50 60 70 80 90 →
Cardinal	83 eighty-three
Ordinal	83rd eighty-third
Factorization	$p r i m e$
Divisors	1, 83
Roman numeral	LXXXIII
Binary	01010011
Hexadecimal	53

1 In mathematics
2 Christian Neo-Nazi symbol
3 In astronomy
4 In Judaism
5 In other fields
6 In sports
7 References

[edit] 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 $3 n - 1$ .

It is also a highly cototient number.

The TI-83 and 83+, a calculator from Texas Instruments.

[edit] Christian Neo-Nazi symbol

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.^[1]

This symbology is also known to be used by many non-racist, conservative Christians and non-denominational Churches.^{[citation needed]}

[edit] 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.

[edit] In Judaism

In Judaism when someone reaches 83 they may celebrate a "second bar mitzvah."

[edit] In other fields

Eighty-three is also:

The atomic number of bismuth.

The year AD 83, 83 BC, or 1983.
Robert Urich starred in the film, "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
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 is a French electronic music group.
No stable isotope of any element has an atomic mass number of 83.
Frank Sinatra charted 83 Billboard Top 200 albums