1. Numbers
  2. Compare 991 vs 1000

Compare 991 vs 1000

Property9911000
Typeprimecomposite number
Unique factors12
Total factors16
Prime factorization991123 × 53
Prime factorization9912 × 2 × 2 × 5 × 5 × 5
Divisors count216
Divisors1, 9911, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000
Number of properties100
Additive primes89th 
Chen primes115th 
Emirps36th 
Isolated primes98th 
Lucky primes42nd 
Primes167th 
Sexy primes (1st member)74th 
Solinas primes43rd 
Super primes39th 
Ulam primes18th 
Roman numberalsCMXCIM
Base 21111011111211111010002
Base 31100201311010013
Base 4331334332204
Base 5124315130005
Base 64331643446
Base 72614726267
Base 81737817508
Base 91321913319
Base 1099110100010
Base 118211182a11
Base 126a7126b412
Base 135b3135bc13
Base 1450b1451614
Base 154611546a15
Base 163df163e816
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