Compare 61991 vs 61993
| Property | 61991 | 61993 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 619911 | 471 × 13191 |
| Prime factorization | 61991 | 47 × 1319 |
| Divisors count | 2 | 4 |
| Divisors | 1, 61991 | 1, 47, 1319, 61993 |
| Number of properties | 5 | 1 |
| Chen primes | 2860th | |
| Cousin primes (2nd member) | 826th | |
| Isolated primes | 4579th | |
| Primes | 6232nd | |
| Semiprimes | 14830th | |
| Sophie germain primes | 796th | |
| Roman numberals | ||
| Base 2 | 11110010001001112 | 11110010001010012 |
| Base 3 | 100110002223 | 100110010013 |
| Base 4 | 330202134 | 330202214 |
| Base 5 | 34404315 | 34404335 |
| Base 6 | 11545556 | 11550016 |
| Base 7 | 3455067 | 3455117 |
| Base 8 | 1710478 | 1710518 |
| Base 9 | 1040289 | 1040319 |
| Base 10 | 6199110 | 6199310 |
| Base 11 | 4263611 | 4263811 |
| Base 12 | 2ba5b12 | 2ba6112 |
| Base 13 | 222a713 | 222a913 |
| Base 14 | 1883d14 | 1884114 |
| Base 15 | 1357b15 | 1357d15 |
| Base 16 | f22716 | f22916 |