Compare 901990 vs 901997
| Property | 901990 | 901997 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 51 × 901991 | 9019971 |
| Prime factorization | 2 × 5 × 90199 | 901997 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 5, 10, 90199, 180398, 450995, 901990 | 1, 901997 |
| Number of properties | 0 | 4 |
| Chen primes | 27392nd | |
| Cousin primes (2nd member) | 7487th | |
| Isolated primes | 56446th | |
| Primes | 71421st | |
| Roman numberals | ||
| Base 2 | 110111000011011001102 | 110111000011011011012 |
| Base 3 | 12002110220013 | 12002110220223 |
| Base 4 | 31300312124 | 31300312314 |
| Base 5 | 2123304305 | 2123304425 |
| Base 6 | 311555146 | 311555256 |
| Base 7 | 104444657 | 104445057 |
| Base 8 | 33415468 | 33415558 |
| Base 9 | 16242619 | 16242689 |
| Base 10 | 90199010 | 90199710 |
| Base 11 | 56675111 | 56675811 |
| Base 12 | 375b9a12 | 375ba512 |
| Base 13 | 25772b13 | 25773513 |
| Base 14 | 1969dc14 | 196a0514 |
| Base 15 | 12c3ca15 | 12c3d215 |
| Base 16 | dc36616 | dc36d16 |