83 (number)

In mathematics

• 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.