Compare 397 vs 405
| Property | 397 | 405 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 5 |
| Prime factorization | 3971 | 34 × 51 |
| Prime factorization | 397 | 3 × 3 × 3 × 3 × 5 |
| Divisors count | 2 | 10 |
| Divisors | 1, 397 | 1, 3, 5, 9, 15, 27, 45, 81, 135, 405 |
| Number of properties | 8 | 0 |
| 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 | CCCXCVII | CDV |
| Base 2 | 1100011012 | 1100101012 |
| Base 3 | 1122013 | 1200003 |
| Base 4 | 120314 | 121114 |
| Base 5 | 30425 | 31105 |
| Base 6 | 15016 | 15136 |
| Base 7 | 11057 | 11167 |
| Base 8 | 6158 | 6258 |
| Base 9 | 4819 | 5009 |
| Base 10 | 39710 | 40510 |
| Base 11 | 33111 | 33911 |
| Base 12 | 29112 | 29912 |
| Base 13 | 24713 | 25213 |
| Base 14 | 20514 | 20d14 |
| Base 15 | 1b715 | 1c015 |
| Base 16 | 18d16 | 19516 |