1. Numbers
  2. Compare 991 vs 1291

Compare 991 vs 1291

Property9911291
Typeprimeprime
Unique factors11
Total factors11
Prime factorization991112911
Prime factorization9911291
Divisors count22
Divisors1, 9911, 1291
Number of properties109
Additive primes89th113th
Chen primes115th137th
Emirps36th 
Harmonic primes 73rd
Isolated primes98th 
Long primes 80th
Lucky primes42nd54th
Primes167th210th
Sexy primes (1st member)74th91st
Sexy prime triplets (1st member) 35th
Solinas primes43rd 
Super primes39th 
Twin primes (2nd member) 44th
Ulam primes18th 
Roman numberalsCMXCIMCCXCI
Base 211110111112101000010112
Base 31100201312022113
Base 43313341100234
Base 5124315201315
Base 64331655516
Base 72614735237
Base 81737824138
Base 91321916849
Base 1099110129110
Base 1182111a7411
Base 126a7128b712
Base 135b31378413
Base 1450b1468314
Base 15461155b115
Base 163df1650b16
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