Compare 990 vs 991
Property | 990 | 991 |
---|---|---|
Type | composite number | prime |
Unique factors | 4 | 1 |
Total factors | 5 | 1 |
Prime factorization | 21 × 32 × 51 × 111 | 9911 |
Prime factorization | 2 × 3 × 3 × 5 × 11 | 991 |
Divisors count | 24 | 2 |
Divisors | 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990 | 1, 991 |
Number of properties | 0 | 10 |
Additive primes | 89th | |
Chen primes | 115th | |
Emirps | 36th | |
Isolated primes | 98th | |
Lucky primes | 42nd | |
Primes | 167th | |
Sexy primes (1st member) | 74th | |
Solinas primes | 43rd | |
Super primes | 39th | |
Ulam primes | 18th | |
Roman numberals | CMXC | CMXCI |
Base 2 | 11110111102 | 11110111112 |
Base 3 | 11002003 | 11002013 |
Base 4 | 331324 | 331334 |
Base 5 | 124305 | 124315 |
Base 6 | 43306 | 43316 |
Base 7 | 26137 | 26147 |
Base 8 | 17368 | 17378 |
Base 9 | 13209 | 13219 |
Base 10 | 99010 | 99110 |
Base 11 | 82011 | 82111 |
Base 12 | 6a612 | 6a712 |
Base 13 | 5b213 | 5b313 |
Base 14 | 50a14 | 50b14 |
Base 15 | 46015 | 46115 |
Base 16 | 3de16 | 3df16 |