1. Numbers
  2. Compare 990 vs 997

Compare 990 vs 997

Property990997
Typecomposite numberprime
Unique factors41
Total factors51
Prime factorization21 × 32 × 51 × 1119971
Prime factorization2 × 3 × 3 × 5 × 11997
Divisors count242
Divisors1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 9901, 997
Number of properties06
Isolated primes 99th
Left-truncatable primes 54th
Lucky primes 43rd
Primes 168th
Pythagorean primes 80th
Sexy primes (2nd member) 74th
Roman numberalsCMXCCMXCVII
Base 21111011110211111001012
Base 31100200311002213
Base 4331324332114
Base 5124305124425
Base 64330643416
Base 72613726237
Base 81736817458
Base 91320913279
Base 109901099710
Base 118201182711
Base 126a6126b112
Base 135b2135b913
Base 1450a1451314
Base 154601546715
Base 163de163e516
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