Compare 990155 vs 990163
| Property | 990155 | 990163 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 1980311 | 9901631 |
| Prime factorization | 5 × 198031 | 990163 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 198031, 990155 | 1, 990163 |
| Number of properties | 1 | 3 |
| Isolated primes | 61583rd | |
| Primes | 77786th | |
| Semiprimes | 208067th | |
| Sexy primes (1st member) | 16242nd | |
| Roman numberals | ||
| Base 2 | 111100011011110010112 | 111100011011110100112 |
| Base 3 | 12120220201023 | 12120220202013 |
| Base 4 | 33012330234 | 33012331034 |
| Base 5 | 2231411105 | 2231411235 |
| Base 6 | 331200156 | 331200316 |
| Base 7 | 112625157 | 112625267 |
| Base 8 | 36157138 | 36157238 |
| Base 9 | 17682129 | 17682219 |
| Base 10 | 99015510 | 99016310 |
| Base 11 | 616a1111 | 616a1911 |
| Base 12 | 3b900b12 | 3b901712 |
| Base 13 | 2888ba13 | 2888c513 |
| Base 14 | 1babb514 | 1babbd14 |
| Base 15 | 1485a515 | 1485ad15 |
| Base 16 | f1bcb16 | f1bd316 |