Compare 21729 vs 21739
| Property | 21729 | 21739 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 72431 | 217391 |
| Prime factorization | 3 × 7243 | 21739 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 7243, 21729 | 1, 21739 |
| Number of properties | 1 | 4 |
| Chen primes | 1198th | |
| Lucky primes | 393rd | |
| Primes | 2439th | |
| Semiprimes | 5491st | |
| Twin primes (2nd member) | 371st | |
| Roman numberals | ||
| Base 2 | 1010100111000012 | 1010100111010112 |
| Base 3 | 10022102103 | 10022110113 |
| Base 4 | 111032014 | 111032234 |
| Base 5 | 11434045 | 11434245 |
| Base 6 | 2443336 | 2443516 |
| Base 7 | 1202317 | 1202447 |
| Base 8 | 523418 | 523538 |
| Base 9 | 327239 | 327349 |
| Base 10 | 2172910 | 2173910 |
| Base 11 | 1536411 | 1537311 |
| Base 12 | 106a912 | 106b712 |
| Base 13 | 9b7613 | 9b8313 |
| Base 14 | 7cc114 | 7ccb14 |
| Base 15 | 668915 | 669415 |
| Base 16 | 54e116 | 54eb16 |