1. Numbers
  2. Compare 1987 vs 2131

Compare 1987 vs 2131

Property19872131
Typeprimeprime
Unique factors11
Total factors11
Prime factorization1987121311
Prime factorization19872131
Divisors count22
Divisors1, 19871, 2131
Number of properties65
Additive primes 168th
Good primes62nd 
Isolated primes181st 
Lucky primes70th 
Primes300th321st
Sexy primes (1st member)127th134th
Sexy prime triplets (1st member)50th51st
Twin primes (2nd member) 66th
Roman numberalsMCMLXXXVIIMMCXXXI
Base 21111100001121000010100112
Base 32201121322202213
Base 413300342011034
Base 5304225320115
Base 6131116135116
Base 75536761337
Base 83703841238
Base 92647928279
Base 10198710213110
Base 11154711166811
Base 12119712129712
Base 13b9b13c7c13
Base 14a1d14ac314
Base 158c71597115
Base 167c31685316
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