Compare 661438 vs 661439
| Property | 661438 | 661439 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 21 × 3307191 | 6614391 |
| Prime factorization | 2 × 330719 | 661439 |
| Divisors count | 4 | 2 |
| Divisors | 1, 2, 330719, 661438 | 1, 661439 |
| Number of properties | 1 | 5 |
| Additive primes | 20957th | |
| Isolated primes | 42097th | |
| Primes | 53680th | |
| Safe primes | 3100th | |
| Semiprimes | 141531st | |
| Ulam primes | 3940th | |
| Roman numberals | ||
| Base 2 | 101000010111101111102 | 101000010111101111112 |
| Base 3 | 10201210222013 | 10201210222023 |
| Base 4 | 22011323324 | 22011323334 |
| Base 5 | 1321312235 | 1321312245 |
| Base 6 | 221021146 | 221021156 |
| Base 7 | 54232517 | 54232527 |
| Base 8 | 24136768 | 24136778 |
| Base 9 | 12172819 | 12172829 |
| Base 10 | 66143810 | 66143910 |
| Base 11 | 411a4811 | 411a4911 |
| Base 12 | 27a93a12 | 27a93b12 |
| Base 13 | 1a20ab13 | 1a20ac13 |
| Base 14 | 13309814 | 13309914 |
| Base 15 | d0ead15 | d0eae15 |
| Base 16 | a17be16 | a17bf16 |