1. Numbers
  2. Compare 21989 vs 21997

Compare 21989 vs 21997

Property2198921997
Typesemiprimeprime
Unique factors21
Total factors21
Prime factorization111 × 19991219971
Prime factorization11 × 199921997
Divisors count42
Divisors1, 11, 1999, 219891, 21997
Number of properties18
Chen primes 1209th
Isolated primes 1721st
Left-truncatable primes 173rd
Primes 2464th
Pythagorean primes 1223rd
Semiprimes5552nd 
Sexy primes (1st member) 743rd
Sexy primes (2nd member) 742nd
Sexy prime triplets (2nd member) 202nd
Roman numberals  
Base 210101011110010121010101111011012
Base 31010011102310100112013
Base 4111132114111132314
Base 51200424512004425
Base 624544562455016
Base 712105271210637
Base 8527458527558
Base 9331429331519
Base 1021989102199710
Base 1115580111558811
Base 1210885121089112
Base 13a01613a02113
Base 14802914803314
Base 1567ae1567b715
Base 1655e51655ed16
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