1. Numbers
  2. Compare 639 vs 641

Compare 639 vs 641

Property639641
Typecomposite numberprime
Unique factors21
Total factors31
Prime factorization32 × 7116411
Prime factorization3 × 3 × 71641
Divisors count62
Divisors1, 3, 9, 71, 213, 6391, 641
Number of properties014
Additive primes 62nd
Chen primes 81st
Good primes 35th
Primes 116th
Prime triplets (1st member) 24th
Proth primes 14th
Pythagorean primes 55th
Quartan primes 6th
Sexy primes (1st member) 57th
Sexy prime quadrupletss (1st member) 7th
Sexy prime triplets (1st member) 24th
Solinas primes 41st
Sophie germain primes 28th
Twin primes (1st member) 29th
Roman numberalsDCXXXIXDCXLI
Base 21001111111210100000012
Base 321220032122023
Base 4213334220014
Base 5100245100315
Base 62543625456
Base 71602716047
Base 81177812018
Base 978097829
Base 106391064110
Base 115311153311
Base 124531245512
Base 133a2133a413
Base 143391433b14
Base 152c9152cb15
Base 1627f1628116
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