83 (number)

Template:Infobox numberTemplate:Short description 83 (eighty-three) is the natural number following 82 and preceding 84.

In mathematics

83 is:

• the sum of three consecutive primes (23 + 29 + 31).
• the sum of five consecutive primes (11 + 13 + 17 + 19 + 23).
• the 23rd prime number, following 79 (of which it is also a cousin prime) 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 also to be Christian.
• An emoticon based on :3 with wide-open eyes.

References

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