Compare 989 vs 997
| Property | 989 | 997 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 231 × 431 | 9971 |
| Prime factorization | 23 × 43 | 997 |
| Divisors count | 4 | 2 |
| Divisors | 1, 23, 43, 989 | 1, 997 |
| Number of properties | 1 | 6 |
| Isolated primes | 99th | |
| Left-truncatable primes | 54th | |
| Lucky primes | 43rd | |
| Primes | 168th | |
| Pythagorean primes | 80th | |
| Semiprimes | 296th | |
| Sexy primes (2nd member) | 74th | |
| Roman numberals | CMLXXXIX | CMXCVII |
| Base 2 | 11110111012 | 11111001012 |
| Base 3 | 11001223 | 11002213 |
| Base 4 | 331314 | 332114 |
| Base 5 | 124245 | 124425 |
| Base 6 | 43256 | 43416 |
| Base 7 | 26127 | 26237 |
| Base 8 | 17358 | 17458 |
| Base 9 | 13189 | 13279 |
| Base 10 | 98910 | 99710 |
| Base 11 | 81a11 | 82711 |
| Base 12 | 6a512 | 6b112 |
| Base 13 | 5b113 | 5b913 |
| Base 14 | 50914 | 51314 |
| Base 15 | 45e15 | 46715 |
| Base 16 | 3dd16 | 3e516 |