Compare 491 vs 691
| Property | 491 | 691 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 4911 | 6911 |
| Prime factorization | 491 | 691 |
| Divisors count | 2 | 2 |
| Divisors | 1, 491 | 1, 691 |
| Number of properties | 7 | 3 |
| Chen primes | 66th | |
| Cousin primes (2nd member) | 26th | |
| Harmonic primes | 38th | 50th |
| Isolated primes | 47th | 66th |
| Long primes | 34th | |
| Primes | 94th | 125th |
| Sophie germain primes | 25th | |
| Roman numberals | CDXCI | DCXCI |
| Base 2 | 1111010112 | 10101100112 |
| Base 3 | 2000123 | 2211213 |
| Base 4 | 132234 | 223034 |
| Base 5 | 34315 | 102315 |
| Base 6 | 21356 | 31116 |
| Base 7 | 13017 | 20057 |
| Base 8 | 7538 | 12638 |
| Base 9 | 6059 | 8479 |
| Base 10 | 49110 | 69110 |
| Base 11 | 40711 | 57911 |
| Base 12 | 34b12 | 49712 |
| Base 13 | 2ba13 | 41213 |
| Base 14 | 27114 | 37514 |
| Base 15 | 22b15 | 31115 |
| Base 16 | 1eb16 | 2b316 |