Compare 397 vs 631
| Property | 397 | 631 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3971 | 6311 |
| Prime factorization | 397 | 631 |
| Divisors count | 2 | 2 |
| Divisors | 1, 397 | 1, 631 |
| Number of properties | 8 | 6 |
| Additive primes | 45th | |
| Centered triangular primes | 7th | |
| Chen primes | 80th | |
| Cousin primes (1st member) | 22nd | |
| Cuban primes 1 | 8th | 10th |
| Happy primes | 21st | |
| Isolated primes | 37th | 60th |
| Left-truncatable primes | 31st | |
| Lucky primes | 32nd | |
| Primes | 78th | 115th |
| Pythagorean primes | 37th | |
| Roman numberals | CCCXCVII | DCXXXI |
| Base 2 | 1100011012 | 10011101112 |
| Base 3 | 1122013 | 2121013 |
| Base 4 | 120314 | 213134 |
| Base 5 | 30425 | 100115 |
| Base 6 | 15016 | 25316 |
| Base 7 | 11057 | 15617 |
| Base 8 | 6158 | 11678 |
| Base 9 | 4819 | 7719 |
| Base 10 | 39710 | 63110 |
| Base 11 | 33111 | 52411 |
| Base 12 | 29112 | 44712 |
| Base 13 | 24713 | 39713 |
| Base 14 | 20514 | 33114 |
| Base 15 | 1b715 | 2c115 |
| Base 16 | 18d16 | 27716 |