Compare 990101 vs 990121
| Property | 990101 | 990121 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 71 × 1414431 | 111 × 900111 |
| Prime factorization | 7 × 141443 | 11 × 90011 |
| Divisors count | 4 | 4 |
| Divisors | 1, 7, 141443, 990101 | 1, 11, 90011, 990121 |
| Number of properties | 1 | 1 |
| Semiprimes | 208052nd | 208057th |
| Roman numberals | ||
| Base 2 | 111100011011100101012 | 111100011011101010012 |
| Base 3 | 12120220111023 | 12120220120113 |
| Base 4 | 33012321114 | 33012322214 |
| Base 5 | 2231404015 | 2231404415 |
| Base 6 | 331154456 | 331155216 |
| Base 7 | 112624107 | 112624367 |
| Base 8 | 36156258 | 36156518 |
| Base 9 | 17681429 | 17681649 |
| Base 10 | 99010110 | 99012110 |
| Base 11 | 61697211 | 61699011 |
| Base 12 | 3b8b8512 | 3b8ba112 |
| Base 13 | 28887813 | 28889213 |
| Base 14 | 1bab7714 | 1bab8d14 |
| Base 15 | 14856b15 | 14858115 |
| Base 16 | f1b9516 | f1ba916 |