Compare 673 vs 681
| Property | 673 | 681 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6731 | 31 × 2271 |
| Prime factorization | 673 | 3 × 227 |
| Divisors count | 2 | 4 |
| Divisors | 1, 673 | 1, 3, 227, 681 |
| Number of properties | 9 | 1 |
| Cousin primes (1st member) | 30th | |
| Happy primes | 27th | |
| Isolated primes | 63rd | |
| Left-truncatable primes | 41st | |
| Lucky primes | 34th | |
| Primes | 122nd | |
| Proth primes | 15th | |
| Pythagorean primes | 58th | |
| Semiprimes | 204th | |
| Ulam primes | 14th | |
| Roman numberals | DCLXXIII | DCLXXXI |
| Base 2 | 10101000012 | 10101010012 |
| Base 3 | 2202213 | 2210203 |
| Base 4 | 222014 | 222214 |
| Base 5 | 101435 | 102115 |
| Base 6 | 30416 | 30536 |
| Base 7 | 16517 | 16627 |
| Base 8 | 12418 | 12518 |
| Base 9 | 8279 | 8369 |
| Base 10 | 67310 | 68110 |
| Base 11 | 56211 | 56a11 |
| Base 12 | 48112 | 48912 |
| Base 13 | 3ca13 | 40513 |
| Base 14 | 36114 | 36914 |
| Base 15 | 2ed15 | 30615 |
| Base 16 | 2a116 | 2a916 |