Compare 3991 vs 4003
| Property | 3991 | 4003 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 131 × 3071 | 40031 |
| Prime factorization | 13 × 307 | 4003 |
| Divisors count | 4 | 2 |
| Divisors | 1, 13, 307, 3991 | 1, 4003 |
| Number of properties | 1 | 6 |
| Additive primes | 283rd | |
| Cousin primes (1st member) | 109th | |
| Lucky primes | 116th | |
| Primes | 552nd | |
| Prime triplets (2nd member) | 72nd | |
| Semiprimes | 1102nd | |
| Twin primes (2nd member) | 104th | |
| Roman numberals | MMMCMXCI | MMMMIII |
| Base 2 | 1111100101112 | 1111101000112 |
| Base 3 | 121102113 | 121110213 |
| Base 4 | 3321134 | 3322034 |
| Base 5 | 1114315 | 1120035 |
| Base 6 | 302516 | 303116 |
| Base 7 | 144317 | 144467 |
| Base 8 | 76278 | 76438 |
| Base 9 | 54249 | 54379 |
| Base 10 | 399110 | 400310 |
| Base 11 | 2aa911 | 300a11 |
| Base 12 | 238712 | 239712 |
| Base 13 | 1a8013 | 1a8c13 |
| Base 14 | 165114 | 165d14 |
| Base 15 | 12b115 | 12bd15 |
| Base 16 | f9716 | fa316 |