1. Numbers
  2. Compare 1981 vs 1993

Compare 1981 vs 1993

Property19811993
Typesemiprimeprime
Unique factors21
Total factors21
Prime factorization71 × 283119931
Prime factorization7 × 2831993
Divisors count42
Divisors1, 7, 283, 19811, 1993
Number of properties110
Cousin primes (1st member) 64th
Good primes 63rd
Harmonic primes 112th
Isolated primes 182nd
Primes 301st
Prime triplets (1st member) 49th
Pythagorean primes 146th
Semiprimes572nd 
Sexy primes (1st member) 128th
Sexy primes (2nd member) 127th
Sexy prime triplets (2nd member) 50th
Roman numberalsMCMLXXXIMCMXCIII
Base 2111101111012111110010012
Base 32201101322012113
Base 413233141330214
Base 5304115304335
Base 6131016131216
Base 75530755457
Base 83675837118
Base 92641926549
Base 10198110199310
Base 11154111155211
Base 1211911211a112
Base 13b9513ba413
Base 14a1714a2514
Base 158c1158cd15
Base 167bd167c916
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