1. Numbers
  2. Compare 249 vs 257

Compare 249 vs 257

Property249257
Typesemiprimeprime
Unique factors21
Total factors21
Prime factorization31 × 8312571
Prime factorization3 × 83257
Divisors count42
Divisors1, 3, 83, 2491, 257
Number of properties116
Chen primes 42nd
Fermat primes 4th
Good primes 20th
Isolated primes 22nd
Long primes 21st
Pierpont primes 14th
Primes 55th
Proth primes 10th
Pythagorean primes 25th
Quartan primes 4th
Semiprimes80th 
Sexy primes (1st member) 31st
Sexy primes (2nd member) 30th
Sexy prime quadrupletss (2nd member) 5th
Sexy prime triplets (1st member) 16th
Sexy prime triplets (2nd member) 15th
Solinas primes 31st
Roman numberalsCCXLIXCCLVII
Base 21111100121000000012
Base 310002031001123
Base 433214100014
Base 51444520125
Base 61053611056
Base 750475157
Base 837184018
Base 930693159
Base 102491025710
Base 112071121411
Base 121891219512
Base 131621316a13
Base 1413b1414514
Base 151191512215
Base 16f91610116
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