Compare 677 vs 681
| Property | 677 | 681 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6771 | 31 × 2271 |
| Prime factorization | 677 | 3 × 227 |
| Divisors count | 2 | 4 |
| Divisors | 1, 677 | 1, 3, 227, 681 |
| Number of properties | 6 | 1 |
| Chen primes | 85th | |
| Cousin primes (2nd member) | 30th | |
| Isolated primes | 64th | |
| Primes | 123rd | |
| Pythagorean primes | 59th | |
| Semiprimes | 204th | |
| Sexy primes (1st member) | 60th | |
| Roman numberals | DCLXXVII | DCLXXXI |
| Base 2 | 10101001012 | 10101010012 |
| Base 3 | 2210023 | 2210203 |
| Base 4 | 222114 | 222214 |
| Base 5 | 102025 | 102115 |
| Base 6 | 30456 | 30536 |
| Base 7 | 16557 | 16627 |
| Base 8 | 12458 | 12518 |
| Base 9 | 8329 | 8369 |
| Base 10 | 67710 | 68110 |
| Base 11 | 56611 | 56a11 |
| Base 12 | 48512 | 48912 |
| Base 13 | 40113 | 40513 |
| Base 14 | 36514 | 36914 |
| Base 15 | 30215 | 30615 |
| Base 16 | 2a516 | 2a916 |