Compare 990021 vs 990023
| Property | 990021 | 990023 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 3311 × 9971 | 9900231 |
| Prime factorization | 3 × 331 × 997 | 990023 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 331, 993, 997, 2991, 330007, 990021 | 1, 990023 |
| Number of properties | 0 | 4 |
| Additive primes | 29856th | |
| Isolated primes | 61577th | |
| Primes | 77780th | |
| Ulam primes | 5704th | |
| Roman numberals | ||
| Base 2 | 111100011011010001012 | 111100011011010001112 |
| Base 3 | 12120220011103 | 12120220011123 |
| Base 4 | 33012310114 | 33012310134 |
| Base 5 | 2231400415 | 2231400435 |
| Base 6 | 331152336 | 331152356 |
| Base 7 | 112622347 | 112622367 |
| Base 8 | 36155058 | 36155078 |
| Base 9 | 17680439 | 17680459 |
| Base 10 | 99002110 | 99002310 |
| Base 11 | 6168aa11 | 61690111 |
| Base 12 | 3b8b1912 | 3b8b1b12 |
| Base 13 | 28881613 | 28881813 |
| Base 14 | 1bab1b14 | 1bab1d14 |
| Base 15 | 14851615 | 14851815 |
| Base 16 | f1b4516 | f1b4716 |