Compare 990991 vs 990999
| Property | 990991 | 990999 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 4431 × 22371 | 32 × 1491 × 7391 |
| Prime factorization | 443 × 2237 | 3 × 3 × 149 × 739 |
| Divisors count | 4 | 12 |
| Divisors | 1, 443, 2237, 990991 | 1, 3, 9, 149, 447, 739, 1341, 2217, 6651, 110111, 330333, 990999 |
| Number of properties | 1 | 0 |
| Semiprimes | 208236th | |
| Roman numberals | ||
| Base 2 | 111100011111000011112 | 111100011111000101112 |
| Base 3 | 12121001011013 | 12121001012003 |
| Base 4 | 33013300334 | 33013301134 |
| Base 5 | 2232024315 | 2232024445 |
| Base 6 | 331235316 | 331235436 |
| Base 7 | 112651217 | 112651327 |
| Base 8 | 36174178 | 36174278 |
| Base 9 | 17703419 | 17703509 |
| Base 10 | 99099110 | 99099910 |
| Base 11 | 61760111 | 61760911 |
| Base 12 | 3b95a712 | 3b95b312 |
| Base 13 | 2890b113 | 2890b913 |
| Base 14 | 1bb21114 | 1bb21914 |
| Base 15 | 14896115 | 14896915 |
| Base 16 | f1f0f16 | f1f1716 |