Compare 811990 vs 811991
| Property | 811990 | 811991 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 51 × 811991 | 8119911 |
| Prime factorization | 2 × 5 × 81199 | 811991 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 5, 10, 81199, 162398, 405995, 811990 | 1, 811991 |
| Number of properties | 0 | 4 |
| Additive primes | 25079th | |
| Isolated primes | 51159th | |
| Primes | 64832nd | |
| Sexy primes (1st member) | 13751st | |
| Roman numberals | ||
| Base 2 | 110001100011110101102 | 110001100011110101112 |
| Base 3 | 11120202112013 | 11120202112023 |
| Base 4 | 30120331124 | 30120331134 |
| Base 5 | 2014404305 | 2014404315 |
| Base 6 | 252231146 | 252231156 |
| Base 7 | 66212147 | 66212157 |
| Base 8 | 30617268 | 30617278 |
| Base 9 | 14667519 | 14667529 |
| Base 10 | 81199010 | 81199110 |
| Base 11 | 50507311 | 50507411 |
| Base 12 | 331a9a12 | 331a9b12 |
| Base 13 | 22578a13 | 22578b13 |
| Base 14 | 171cb414 | 171cb514 |
| Base 15 | 1108ca15 | 1108cb15 |
| Base 16 | c63d616 | c63d716 |