Compare 1609 vs 1999
| Property | 1609 | 1999 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 16091 | 19991 |
| Prime factorization | 1609 | 1999 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1609 | 1, 1999 |
| Number of properties | 6 | 8 |
| Centered triangular primes | 10th | |
| Cousin primes (1st member) | 58th | 65th |
| Harmonic primes | 87th | |
| Primes | 254th | 303rd |
| Prime triplets (2nd member) | 42nd | 50th |
| Prime triplets (3rd member) | 49th | |
| Pythagorean primes | 121st | |
| Sexy primes (2nd member) | 128th | |
| Sexy prime triplets (3rd member) | 50th | |
| Twin primes (2nd member) | 51st | 61st |
| Roman numberals | MDCIX | MCMXCIX |
| Base 2 | 110010010012 | 111110011112 |
| Base 3 | 20121213 | 22020013 |
| Base 4 | 1210214 | 1330334 |
| Base 5 | 224145 | 304445 |
| Base 6 | 112416 | 131316 |
| Base 7 | 44567 | 55547 |
| Base 8 | 31118 | 37178 |
| Base 9 | 21779 | 26619 |
| Base 10 | 160910 | 199910 |
| Base 11 | 123311 | 155811 |
| Base 12 | b2112 | 11a712 |
| Base 13 | 96a13 | baa13 |
| Base 14 | 82d14 | a2b14 |
| Base 15 | 72415 | 8d415 |
| Base 16 | 64916 | 7cf16 |