Compare 81438 vs 81439
| Property | 81438 | 81439 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 4 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 21 × 31 × 72 × 2771 | 814391 |
| Prime factorization | 2 × 3 × 7 × 7 × 277 | 81439 |
| Divisors count | 24 | 2 |
| Divisors | 1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 277, 294, 554, 831, 1662, 1939, 3878, 5817, 11634, 13573, 27146, 40719, 81438 | 1, 81439 |
| Number of properties | 0 | 5 |
| Harmonic primes | 3009th | |
| Isolated primes | 5917th | |
| Lucky primes | 1074th | |
| Primes | 7968th | |
| Ulam primes | 581st | |
| Roman numberals | ||
| Base 2 | 100111110000111102 | 100111110000111112 |
| Base 3 | 110102010203 | 110102010213 |
| Base 4 | 1033201324 | 1033201334 |
| Base 5 | 101012235 | 101012245 |
| Base 6 | 14250106 | 14250116 |
| Base 7 | 4563007 | 4563017 |
| Base 8 | 2370368 | 2370378 |
| Base 9 | 1336369 | 1336379 |
| Base 10 | 8143810 | 8143910 |
| Base 11 | 5620511 | 5620611 |
| Base 12 | 3b16612 | 3b16712 |
| Base 13 | 2b0b613 | 2b0b713 |
| Base 14 | 2197014 | 2197114 |
| Base 15 | 191e315 | 191e415 |
| Base 16 | 13e1e16 | 13e1f16 |