Compare 3991 vs 4000
| Property | 3991 | 4000 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 8 |
| Prime factorization | 131 × 3071 | 25 × 53 |
| Prime factorization | 13 × 307 | 2 × 2 × 2 × 2 × 2 × 5 × 5 × 5 |
| Divisors count | 4 | 24 |
| Divisors | 1, 13, 307, 3991 | 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000 |
| Number of properties | 1 | 0 |
| Semiprimes | 1102nd | |
| Roman numberals | MMMCMXCI | MMMM |
| Base 2 | 1111100101112 | 1111101000002 |
| Base 3 | 121102113 | 121110113 |
| Base 4 | 3321134 | 3322004 |
| Base 5 | 1114315 | 1120005 |
| Base 6 | 302516 | 303046 |
| Base 7 | 144317 | 144437 |
| Base 8 | 76278 | 76408 |
| Base 9 | 54249 | 54349 |
| Base 10 | 399110 | 400010 |
| Base 11 | 2aa911 | 300711 |
| Base 12 | 238712 | 239412 |
| Base 13 | 1a8013 | 1a8913 |
| Base 14 | 165114 | 165a14 |
| Base 15 | 12b115 | 12ba15 |
| Base 16 | f9716 | fa016 |