Compare 1491 vs 1499
| Property | 1491 | 1499 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 71 × 711 | 14991 |
| Prime factorization | 3 × 7 × 71 | 1499 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 7, 21, 71, 213, 497, 1491 | 1, 1499 |
| Number of properties | 0 | 11 |
| Additive primes | 130th | |
| Chen primes | 154th | |
| Emirps | 72nd | |
| Harmonic primes | 82nd | |
| Isolated primes | 140th | |
| Primes | 239th | |
| Sexy primes (2nd member) | 105th | |
| Sexy prime quadrupletss (4th member) | 9th | |
| Sexy prime triplets (3rd member) | 40th | |
| Sophie germain primes | 50th | |
| Super primes | 52nd | |
| Roman numberals | MCDXCI | MCDXCIX |
| Base 2 | 101110100112 | 101110110112 |
| Base 3 | 20010203 | 20011123 |
| Base 4 | 1131034 | 1131234 |
| Base 5 | 214315 | 214445 |
| Base 6 | 105236 | 105356 |
| Base 7 | 42307 | 42417 |
| Base 8 | 27238 | 27338 |
| Base 9 | 20369 | 20459 |
| Base 10 | 149110 | 149910 |
| Base 11 | 113611 | 114311 |
| Base 12 | a4312 | a4b12 |
| Base 13 | 8a913 | 8b413 |
| Base 14 | 78714 | 79114 |
| Base 15 | 69615 | 69e15 |
| Base 16 | 5d316 | 5db16 |