Compare 721 vs 727
| Property | 721 | 727 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 71 × 1031 | 7271 |
| Prime factorization | 7 × 103 | 727 |
| Divisors count | 4 | 2 |
| Divisors | 1, 7, 103, 721 | 1, 727 |
| Number of properties | 1 | 8 |
| Good primes | 36th | |
| Isolated primes | 70th | |
| Long primes | 47th | |
| Lucky primes | 35th | |
| Palindromic primes | 15th | |
| Primes | 129th | |
| Semiprimes | 219th | |
| Sexy primes (1st member) | 61st | |
| Sexy prime triplets (1st member) | 26th | |
| Roman numberals | DCCXXI | DCCXXVII |
| Base 2 | 10110100012 | 10110101112 |
| Base 3 | 2222013 | 2222213 |
| Base 4 | 231014 | 231134 |
| Base 5 | 103415 | 104025 |
| Base 6 | 32016 | 32116 |
| Base 7 | 20507 | 20567 |
| Base 8 | 13218 | 13278 |
| Base 9 | 8819 | 8879 |
| Base 10 | 72110 | 72710 |
| Base 11 | 5a611 | 60111 |
| Base 12 | 50112 | 50712 |
| Base 13 | 43613 | 43c13 |
| Base 14 | 39714 | 39d14 |
| Base 15 | 33115 | 33715 |
| Base 16 | 2d116 | 2d716 |