The folowing table expresses '169' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|
| 2 | 10101001 | 100 | 1 | |||||
| 3 | 20021 | 12,10 | 1 | |||||
| 4 | 2221 | 13,10 | 1 | |||||
| 5 | 1134 | 14,10 | 1 | |||||
| 6 | 441 | 13 | 4 | |||||
| 7 | 331 | 10 | 1 | |||||
| 8 | 251 | 10 | 1 | |||||
| 9 | 207 | 10 | 1 | |||||
| 10 | 169 | 16 | 7 | |||||
| 11 | 144 | 9 | ||||||
| 12 | 121 | 4 | ||||||
| 13 | 100 | 1 | ||||||
| 14 | C1 | D | ||||||
| 15 | B4,10 | 1 | ||||||
| 16 | A9,13 | 4 |
Factors: 132
169 is in the Pythagorean Triple: (119, 120, 169).