Compare 397 vs 647
| Property | 397 | 647 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3971 | 6471 |
| Prime factorization | 397 | 647 |
| Divisors count | 2 | 2 |
| Divisors | 1, 397 | 1, 647 |
| Number of properties | 8 | 15 |
| Additive primes | 45th | 64th |
| Chen primes | 82nd | |
| Class 1+ primes | 17th | |
| Cousin primes (1st member) | 22nd | |
| Cousin primes (2nd member) | 29th | |
| Cuban primes 1 | 8th | |
| Happy primes | 21st | |
| Isolated primes | 37th | 61st |
| Left-truncatable primes | 31st | 39th |
| Long primes | 43rd | |
| Pierpont primes of the 2nd kind | 17th | |
| Primes | 78th | 118th |
| Prime triplets (3rd member) | 24th | |
| Pythagorean primes | 37th | |
| Sexy primes (1st member) | 58th | |
| Sexy primes (2nd member) | 57th | |
| Sexy prime quadrupletss (2nd member) | 7th | |
| Sexy prime triplets (1st member) | 25th | |
| Sexy prime triplets (2nd member) | 24th | |
| Roman numberals | CCCXCVII | DCXLVII |
| Base 2 | 1100011012 | 10100001112 |
| Base 3 | 1122013 | 2122223 |
| Base 4 | 120314 | 220134 |
| Base 5 | 30425 | 100425 |
| Base 6 | 15016 | 25556 |
| Base 7 | 11057 | 16137 |
| Base 8 | 6158 | 12078 |
| Base 9 | 4819 | 7889 |
| Base 10 | 39710 | 64710 |
| Base 11 | 33111 | 53911 |
| Base 12 | 29112 | 45b12 |
| Base 13 | 24713 | 3aa13 |
| Base 14 | 20514 | 34314 |
| Base 15 | 1b715 | 2d215 |
| Base 16 | 18d16 | 28716 |