Compare 1721 vs 1889
| Property | 1721 | 1889 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 17211 | 18891 |
| Prime factorization | 1721 | 1889 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1721 | 1, 1889 |
| Number of properties | 6 | 5 |
| Additive primes | 143rd | |
| Chen primes | 169th | 178th |
| Isolated primes | 175th | |
| Primes | 268th | 290th |
| Pythagorean primes | 130th | 140th |
| Sophie germain primes | 57th | |
| Twin primes (1st member) | 55th | |
| Ulam primes | 25th | |
| Roman numberals | MDCCXXI | MDCCCLXXXIX |
| Base 2 | 110101110012 | 111011000012 |
| Base 3 | 21002023 | 21202223 |
| Base 4 | 1223214 | 1312014 |
| Base 5 | 233415 | 300245 |
| Base 6 | 115456 | 124256 |
| Base 7 | 50067 | 53367 |
| Base 8 | 32718 | 35418 |
| Base 9 | 23229 | 25289 |
| Base 10 | 172110 | 188910 |
| Base 11 | 132511 | 146811 |
| Base 12 | bb512 | 111512 |
| Base 13 | a2513 | b2413 |
| Base 14 | 8ad14 | 98d14 |
| Base 15 | 79b15 | 85e15 |
| Base 16 | 6b916 | 76116 |