Compare 1399 vs 1531
| Property | 1399 | 1531 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 13991 | 15311 |
| Prime factorization | 1399 | 1531 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1399 | 1, 1531 |
| Number of properties | 6 | 5 |
| Centered decagonal primes | 13th | |
| Chen primes | 145th | |
| Emirps | 65th | |
| Good primes | 52nd | |
| Harmonic primes | 76th | |
| Isolated primes | 131st | 143rd |
| Long primes | 91st | |
| Primes | 222nd | 242nd |
| Ulam primes | 22nd | |
| Roman numberals | MCCCXCIX | MDXXXI |
| Base 2 | 101011101112 | 101111110112 |
| Base 3 | 12202113 | 20022013 |
| Base 4 | 1113134 | 1133234 |
| Base 5 | 210445 | 221115 |
| Base 6 | 102516 | 110316 |
| Base 7 | 40367 | 43157 |
| Base 8 | 25678 | 27738 |
| Base 9 | 18249 | 20819 |
| Base 10 | 139910 | 153110 |
| Base 11 | 106211 | 117211 |
| Base 12 | 98712 | a7712 |
| Base 13 | 83813 | 90a13 |
| Base 14 | 71d14 | 7b514 |
| Base 15 | 63415 | 6c115 |
| Base 16 | 57716 | 5fb16 |