Compare 61990 vs 61991
| Property | 61990 | 61991 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 51 × 61991 | 619911 |
| Prime factorization | 2 × 5 × 6199 | 61991 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 5, 10, 6199, 12398, 30995, 61990 | 1, 61991 |
| Number of properties | 0 | 5 |
| Chen primes | 2860th | |
| Cousin primes (2nd member) | 826th | |
| Isolated primes | 4579th | |
| Primes | 6232nd | |
| Sophie germain primes | 796th | |
| Roman numberals | ||
| Base 2 | 11110010001001102 | 11110010001001112 |
| Base 3 | 100110002213 | 100110002223 |
| Base 4 | 330202124 | 330202134 |
| Base 5 | 34404305 | 34404315 |
| Base 6 | 11545546 | 11545556 |
| Base 7 | 3455057 | 3455067 |
| Base 8 | 1710468 | 1710478 |
| Base 9 | 1040279 | 1040289 |
| Base 10 | 6199010 | 6199110 |
| Base 11 | 4263511 | 4263611 |
| Base 12 | 2ba5a12 | 2ba5b12 |
| Base 13 | 222a613 | 222a713 |
| Base 14 | 1883c14 | 1883d14 |
| Base 15 | 1357a15 | 1357b15 |
| Base 16 | f22616 | f22716 |