Compare 1721 vs 1949
| Property | 1721 | 1949 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 17211 | 19491 |
| Prime factorization | 1721 | 1949 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1721 | 1, 1949 |
| Number of properties | 6 | 8 |
| Additive primes | 143rd | 156th |
| Chen primes | 169th | 183rd |
| Emirps | 95th | |
| Harmonic primes | 110th | |
| Long primes | 115th | |
| Primes | 268th | 296th |
| Pythagorean primes | 130th | 144th |
| Twin primes (1st member) | 55th | 60th |
| Ulam primes | 25th | |
| Roman numberals | MDCCXXI | MCMXLIX |
| Base 2 | 110101110012 | 111100111012 |
| Base 3 | 21002023 | 22000123 |
| Base 4 | 1223214 | 1321314 |
| Base 5 | 233415 | 302445 |
| Base 6 | 115456 | 130056 |
| Base 7 | 50067 | 54537 |
| Base 8 | 32718 | 36358 |
| Base 9 | 23229 | 26059 |
| Base 10 | 172110 | 194910 |
| Base 11 | 132511 | 151211 |
| Base 12 | bb512 | 116512 |
| Base 13 | a2513 | b6c13 |
| Base 14 | 8ad14 | 9d314 |
| Base 15 | 79b15 | 89e15 |
| Base 16 | 6b916 | 79d16 |