The folowing table expresses '391' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
Base | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
---|---|---|---|---|---|---|---|---|---|
2 | 110000111 | 101 | 10 | 1 | |||||
3 | 112111 | 21,10 | 1 | ||||||
4 | 12013 | 13,10 | 1 | ||||||
5 | 3031 | 12 | 3 | ||||||
6 | 1451 | 15,10 | 1 | ||||||
7 | 1066 | 16,10 | 1 | ||||||
8 | 607 | 15 | 6 | ||||||
9 | 474 | 16 | 7 | ||||||
10 | 391 | 13 | 4 | ||||||
11 | 326 | 10 | 1 | ||||||
12 | 287 | 15 | 6 | ||||||
13 | 241 | 7 | |||||||
14 | 1DD | 1D,10 | 1 | ||||||
15 | 1B1 | D | |||||||
16 | 187 | 10 | 1 |
Factors: 17 * 23
391 is in the Pythagorean Triple: (120, 391, 409).