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293 (number)

From Wikipedia, the free encyclopedia
Natural number
← 292293 294 →
Cardinaltwo hundred ninety-three
Ordinal293rd
(two hundred ninety-third)
Factorizationprime
Divisors1, 293
Greek numeralΣϞΓ´
Roman numeralCCXCIII,ccxciii
Binary1001001012
Ternary1012123
Senary12056
Octal4458
Duodecimal20512
Hexadecimal12516

293 is thenatural number following292 and preceding294.

In mathematics

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293 is:

References

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  1. ^"Prime number information".mathworld.wolfram.com.
  2. ^Sloane, N. J. A. (ed.)."Sequence A000040 (The prime numbers)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^Sloane, N. J. A. (ed.)."Sequence A002144 (Pythagorean primes: primes of form 4*k + 1)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^Sloane, N. J. A. (ed.)."Sequence A005384 (Sophie Germain primes p: 2p+1 is also prime)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  5. ^Sloane, N. J. A. (ed.)."Sequence A109611 (Chen primes: primes p such that p + 2 is either a prime or a semiprime)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  6. ^Sloane, N. J. A. (ed.)."Sequence A090467 (Numbers which are not regular figurative or polygonal numbers of order greater than 2. That is, numbers not of the form 1 + k*n(n-1)/2 - (n-1)^2 where n >= 2 and k >= 2)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  7. ^"Tetradic numbers and tetradic primes".mathworld.wolfram.com.
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