The folowing table expresses '921' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1110011001 | 110 | 10 | 1 | ||||||
| 3 | 1021010 | 12,10 | 1 | |||||||
| 4 | 32121 | 21 | 3 | |||||||
| 5 | 12141 | 14,10 | 1 | |||||||
| 6 | 4133 | 15,10 | 1 | |||||||
| 7 | 2454 | 21 | 3 | |||||||
| 8 | 1631 | 13 | 4 | |||||||
| 9 | 1233 | 10 | 1 | |||||||
| 10 | 921 | 12 | 3 | |||||||
| 11 | 768 | 1A,10 | 1 | |||||||
| 12 | 649 | 17 | 8 | |||||||
| 13 | 55B | 18 | 9 | |||||||
| 14 | 49B | 1A | B | |||||||
| 15 | 416 | B | ||||||||
| 16 | 399 | 15 | 6 |
Factors: 3 * 307