Compare 390 vs 397
| Property | 390 | 397 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 4 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 21 × 31 × 51 × 131 | 3971 |
| Prime factorization | 2 × 3 × 5 × 13 | 397 |
| Divisors count | 16 | 2 |
| Divisors | 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390 | 1, 397 |
| Number of properties | 0 | 8 |
| Additive primes | 45th | |
| Cousin primes (1st member) | 22nd | |
| Cuban primes 1 | 8th | |
| Happy primes | 21st | |
| Isolated primes | 37th | |
| Left-truncatable primes | 31st | |
| Primes | 78th | |
| Pythagorean primes | 37th | |
| Roman numberals | CCCXC | CCCXCVII |
| Base 2 | 1100001102 | 1100011012 |
| Base 3 | 1121103 | 1122013 |
| Base 4 | 120124 | 120314 |
| Base 5 | 30305 | 30425 |
| Base 6 | 14506 | 15016 |
| Base 7 | 10657 | 11057 |
| Base 8 | 6068 | 6158 |
| Base 9 | 4739 | 4819 |
| Base 10 | 39010 | 39710 |
| Base 11 | 32511 | 33111 |
| Base 12 | 28612 | 29112 |
| Base 13 | 24013 | 24713 |
| Base 14 | 1dc14 | 20514 |
| Base 15 | 1b015 | 1b715 |
| Base 16 | 18616 | 18d16 |