Compare 1291 vs 1399
| Property | 1291 | 1399 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 12911 | 13991 |
| Prime factorization | 1291 | 1399 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1291 | 1, 1399 |
| Number of properties | 9 | 6 |
| Additive primes | 113th | |
| Chen primes | 137th | 145th |
| Emirps | 65th | |
| Good primes | 52nd | |
| Harmonic primes | 73rd | 76th |
| Isolated primes | 131st | |
| Long primes | 80th | |
| Lucky primes | 54th | |
| Primes | 210th | 222nd |
| Sexy primes (1st member) | 91st | |
| Sexy prime triplets (1st member) | 35th | |
| Twin primes (2nd member) | 44th | |
| Roman numberals | MCCXCI | MCCCXCIX |
| Base 2 | 101000010112 | 101011101112 |
| Base 3 | 12022113 | 12202113 |
| Base 4 | 1100234 | 1113134 |
| Base 5 | 201315 | 210445 |
| Base 6 | 55516 | 102516 |
| Base 7 | 35237 | 40367 |
| Base 8 | 24138 | 25678 |
| Base 9 | 16849 | 18249 |
| Base 10 | 129110 | 139910 |
| Base 11 | a7411 | 106211 |
| Base 12 | 8b712 | 98712 |
| Base 13 | 78413 | 83813 |
| Base 14 | 68314 | 71d14 |
| Base 15 | 5b115 | 63415 |
| Base 16 | 50b16 | 57716 |