Compare 990221 vs 990229
| Property | 990221 | 990229 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 2571 × 38531 | 1311 × 75591 |
| Prime factorization | 257 × 3853 | 131 × 7559 |
| Divisors count | 4 | 4 |
| Divisors | 1, 257, 3853, 990221 | 1, 131, 7559, 990229 |
| Number of properties | 1 | 1 |
| Semiprimes | 208082nd | 208085th |
| Roman numberals | ||
| Base 2 | 111100011100000011012 | 111100011100000101012 |
| Base 3 | 12120220222123 | 12120221000113 |
| Base 4 | 33013000314 | 33013001114 |
| Base 5 | 2231413415 | 2231414045 |
| Base 6 | 331202056 | 331202216 |
| Base 7 | 112626417 | 112626527 |
| Base 8 | 36160158 | 36160258 |
| Base 9 | 17682859 | 17683049 |
| Base 10 | 99022110 | 99022910 |
| Base 11 | 616a7111 | 616a7911 |
| Base 12 | 3b906512 | 3b907112 |
| Base 13 | 28893b13 | 28894613 |
| Base 14 | 1bac2114 | 1bac2914 |
| Base 15 | 1485eb15 | 14860415 |
| Base 16 | f1c0d16 | f1c1516 |