Compare 397 vs 409
| Property | 397 | 409 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3971 | 4091 |
| Prime factorization | 397 | 409 |
| Divisors count | 2 | 2 |
| Divisors | 1, 397 | 1, 409 |
| Number of properties | 8 | 9 |
| Additive primes | 45th | 47th |
| Centered triangular primes | 5th | |
| Chen primes | 57th | |
| Cousin primes (1st member) | 22nd | |
| Cuban primes 1 | 8th | |
| Happy primes | 21st | 22nd |
| Isolated primes | 37th | 39th |
| Left-truncatable primes | 31st | |
| Lucky primes | 22nd | |
| Primes | 78th | 80th |
| Pythagorean primes | 37th | 39th |
| Ulam primes | 11th | |
| Roman numberals | CCCXCVII | CDIX |
| Base 2 | 1100011012 | 1100110012 |
| Base 3 | 1122013 | 1200113 |
| Base 4 | 120314 | 121214 |
| Base 5 | 30425 | 31145 |
| Base 6 | 15016 | 15216 |
| Base 7 | 11057 | 11237 |
| Base 8 | 6158 | 6318 |
| Base 9 | 4819 | 5049 |
| Base 10 | 39710 | 40910 |
| Base 11 | 33111 | 34211 |
| Base 12 | 29112 | 2a112 |
| Base 13 | 24713 | 25613 |
| Base 14 | 20514 | 21314 |
| Base 15 | 1b715 | 1c415 |
| Base 16 | 18d16 | 19916 |