Compare 997 vs 1231
| Property | 997 | 1231 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9971 | 12311 |
| Prime factorization | 997 | 1231 |
| Divisors count | 2 | 2 |
| Divisors | 1, 997 | 1, 1231 |
| Number of properties | 6 | 6 |
| Additive primes | 108th | |
| Emirps | 56th | |
| Isolated primes | 99th | |
| Left-truncatable primes | 54th | |
| Lucky primes | 43rd | 52nd |
| Primes | 168th | 202nd |
| Pythagorean primes | 80th | |
| Sexy primes (1st member) | 88th | |
| Sexy primes (2nd member) | 74th | |
| Twin primes (2nd member) | 42nd | |
| Roman numberals | CMXCVII | MCCXXXI |
| Base 2 | 11111001012 | 100110011112 |
| Base 3 | 11002213 | 12001213 |
| Base 4 | 332114 | 1030334 |
| Base 5 | 124425 | 144115 |
| Base 6 | 43416 | 54116 |
| Base 7 | 26237 | 34067 |
| Base 8 | 17458 | 23178 |
| Base 9 | 13279 | 16179 |
| Base 10 | 99710 | 123110 |
| Base 11 | 82711 | a1a11 |
| Base 12 | 6b112 | 86712 |
| Base 13 | 5b913 | 73913 |
| Base 14 | 51314 | 63d14 |
| Base 15 | 46715 | 57115 |
| Base 16 | 3e516 | 4cf16 |