83 (number)
83 is the natural number following 82 and preceding 84.
In mathematics
83 is:- the sum of three consecutive primes.
- the sum of five consecutive primes.
- the 23rd prime number, following 79 and preceding 89.
- a Sophie Germain prime.
- a safe prime.
- a Chen prime.
- an Eisenstein prime with no imaginary part and real part of the form 3n − 1.
- a highly cototient number.
- the number of primes that are right-truncatable.
- a super-prime, because 23 is prime.
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
- An emoticon based on :3 with wide-open eyes.