Compare 993 vs 997
| Property | 993 | 997 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 3311 | 9971 |
| Prime factorization | 3 × 331 | 997 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 331, 993 | 1, 997 |
| Number of properties | 1 | 6 |
| Isolated primes | 99th | |
| Left-truncatable primes | 54th | |
| Lucky primes | 43rd | |
| Primes | 168th | |
| Pythagorean primes | 80th | |
| Semiprimes | 297th | |
| Sexy primes (2nd member) | 74th | |
| Roman numberals | CMXCIII | CMXCVII |
| Base 2 | 11111000012 | 11111001012 |
| Base 3 | 11002103 | 11002213 |
| Base 4 | 332014 | 332114 |
| Base 5 | 124335 | 124425 |
| Base 6 | 43336 | 43416 |
| Base 7 | 26167 | 26237 |
| Base 8 | 17418 | 17458 |
| Base 9 | 13239 | 13279 |
| Base 10 | 99310 | 99710 |
| Base 11 | 82311 | 82711 |
| Base 12 | 6a912 | 6b112 |
| Base 13 | 5b513 | 5b913 |
| Base 14 | 50d14 | 51314 |
| Base 15 | 46315 | 46715 |
| Base 16 | 3e116 | 3e516 |