The folowing table expresses '821' 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 | 1100110101 | 110 | 10 | 1 | ||||||
| 3 | 1010102 | 12,10 | 1 | |||||||
| 4 | 30311 | 20 | 2 | |||||||
| 5 | 11241 | 14,10 | 1 | |||||||
| 6 | 3445 | 24,10 | 1 | |||||||
| 7 | 2252 | 14 | 5 | |||||||
| 8 | 1465 | 20 | 2 | |||||||
| 9 | 1112 | 5 | ||||||||
| 10 | 821 | 11 | 2 | |||||||
| 11 | 687 | 1A,10 | 1 | |||||||
| 12 | 585 | 16 | 7 | |||||||
| 13 | 4B2 | 14 | 5 | |||||||
| 14 | 429 | 11 | 2 | |||||||
| 15 | 39B | 18 | 9 | |||||||
| 16 | 335 | B |
Factors: Prime
821 is in the Pythagorean Triple: (429, 700, 821).