Compare 990151 vs 990155
| Property | 990151 | 990155 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 9901511 | 51 × 1980311 |
| Prime factorization | 990151 | 5 × 198031 |
| Divisors count | 2 | 4 |
| Divisors | 1, 990151 | 1, 5, 198031, 990155 |
| Number of properties | 3 | 1 |
| Cuban primes 1 | 172nd | |
| Isolated primes | 61582nd | |
| Primes | 77785th | |
| Semiprimes | 208067th | |
| Roman numberals | ||
| Base 2 | 111100011011110001112 | 111100011011110010112 |
| Base 3 | 12120220200213 | 12120220201023 |
| Base 4 | 33012330134 | 33012330234 |
| Base 5 | 2231411015 | 2231411105 |
| Base 6 | 331200116 | 331200156 |
| Base 7 | 112625117 | 112625157 |
| Base 8 | 36157078 | 36157138 |
| Base 9 | 17682079 | 17682129 |
| Base 10 | 99015110 | 99015510 |
| Base 11 | 616a0811 | 616a1111 |
| Base 12 | 3b900712 | 3b900b12 |
| Base 13 | 2888b613 | 2888ba13 |
| Base 14 | 1babb114 | 1babb514 |
| Base 15 | 1485a115 | 1485a515 |
| Base 16 | f1bc716 | f1bcb16 |