83 (number)
(Redirected from Number 83)
| ||||
|---|---|---|---|---|
| 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 | |||
83 (eighty-three) is the natural number following 82 and preceding 84.
In mathematics
[edit]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.[1]
- a safe prime.[2]
- a Chen prime.[3]
- an Eisenstein prime with no imaginary part and real part of the form 3n − 1.
- a highly cototient number.[4]
- the number of primes that are right-truncatable.[5]
- a super-prime, because 23 is prime.
In other fields
[edit]- The eighth letter of the alphabet is H and the third letter is C, thus 83 stands for "Heil Christ," a greeting used by racist organizations that consider themselves also to be Christian and Christians ignorant of that meaning.[6]
- An emoticon based on :3 with wide-open eyes.
References
[edit]- ^ "Sloane's A005384 : Sophie Germain primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ "Sloane's A005385 : Safe primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ "Sloane's A109611 : Chen primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ "Sloane's A100827 : Highly cototient numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ Sloane, N. J. A. (ed.). "Sequence A024770 (Right-truncatable primes: every prefix is prime)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ "Hate Number Symbols: 83 - From A Visual Database of Extremist Symbols, Logos and Tattoos". Archived from the original on 2007-09-11. Retrieved 2007-09-24.