83 (number)
Number
From Wikipedia, the free encyclopedia
83 (eighty-three) is the natural number following 82 and preceding 84.
| ||||
|---|---|---|---|---|
| Cardinal | eighty-three | |||
| Ordinal | 83rd (eighty-third) | |||
| Factorization | prime | |||
| Prime | 23rd | |||
| Divisors | 1, 83 | |||
| Greek numeral | ΠΓ´ | |||
| Roman numeral | LXXXIII, lxxxiii | |||
| Binary | 10100112 | |||
| Ternary | 100023 | |||
| Senary | 2156 | |||
| Octal | 1238 | |||
| Duodecimal | 6B12 | |||
| Hexadecimal | 5316 | |||
In mathematics
83 is a Sophie Germain prime,[1] a safe prime,[2] a Chen prime,[3] and an Eisenstein prime with no imaginary part and real part of the form 3n − 1. It is a cousin prime with 79 and a sexy prime with 89. Because 83 is the 23rd prime number and 23 is prime, 83 is a super-prime.
83 is the sum of three consecutive primes (23 + 29 + 31) and the sum of five consecutive primes (11 + 13 + 17 + 19 + 23).
There are 83 primes that are right-truncatable.[4]
83 is a highly cototient number.[5]
In other fields
The eighth letter of the alphabet is H and the third letter is C, thus 83 stands for "Heil Christ," a greeting used by organizations that consider themselves to be Christian. While not necessarily a hate symbol, it is often used by hate organizations.[6] The Anti-Defamation League classifies 83 as a hate symbol.[7]