1. Numbers
  2. Compare 21993 vs 21997

Compare 21993 vs 21997

Property2199321997
Typesemiprimeprime
Unique factors21
Total factors21
Prime factorization31 × 73311219971
Prime factorization3 × 733121997
Divisors count42
Divisors1, 3, 7331, 219931, 21997
Number of properties18
Chen primes 1209th
Isolated primes 1721st
Left-truncatable primes 173rd
Primes 2464th
Pythagorean primes 1223rd
Semiprimes5553rd 
Sexy primes (1st member) 743rd
Sexy primes (2nd member) 742nd
Sexy prime triplets (2nd member) 202nd
Roman numberals  
Base 210101011110100121010101111011012
Base 31010011120310100112013
Base 4111132214111132314
Base 51200433512004425
Base 624545362455016
Base 712105671210637
Base 8527518527558
Base 9331469331519
Base 1021993102199710
Base 1115584111558811
Base 1210889121089112
Base 13a01a13a02113
Base 14802d14803314
Base 1567b31567b715
Base 1655e91655ed16
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