1. Numbers
  2. Compare 991 vs 1489

Compare 991 vs 1489

Property9911489
Typeprimeprime
Unique factors11
Total factors11
Prime factorization991114891
Prime factorization9911489
Divisors count22
Divisors1, 9911, 1489
Number of properties1012
Additive primes89th 
Centered triangular primes 9th
Chen primes115th 
Cousin primes (1st member) 53rd
Emirps36th 
Harmonic primes 81st
Isolated primes98th 
Lucky primes42nd 
Primes167th237th
Prime quadruplets (4th member) 6th
Prime quintuplet 2s (4th member) 4th
Prime triplets (2nd member) 41st
Prime triplets (3rd member) 40th
Pythagorean primes 115th
Sexy primes (1st member)74th 
Sexy primes (2nd member) 103rd
Solinas primes43rd 
Super primes39th 
Twin primes (2nd member) 50th
Ulam primes18th21st
Roman numberalsCMXCIMCDLXXXIX
Base 211110111112101110100012
Base 31100201320010113
Base 43313341131014
Base 5124315214245
Base 643316105216
Base 72614742257
Base 81737827218
Base 91321920349
Base 1099110148910
Base 1182111113411
Base 126a712a4112
Base 135b3138a713
Base 1450b1478514
Base 154611569415
Base 163df165d116
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