Divisors of the Positive Integer 991
1, 991Sum of all the Divisors of 991, including itself
992Sum of the Proper Divisors of 991
1Properties of the number 991
The integer 991 is an odd number.The integer 991 is a Prime number.
1 is less than 991, so 991 is a deficient number.
The number 991 as a Roman Numeral
CMXCIThe number 991 in various Numeral Systems
| Base | Representation |
|---|---|
| 2: | 1111011111 |
| 3: | 1100201 |
| 4: | 33133 |
| 5: | 12431 |
| 6: | 4331 |
| 7: | 2614 |
| 8: | 1737 |
| 9: | 1321 |
| 10: | 991 |
| 11: | 821 |
| 12: | 6A7 |
| 13: | 5B3 |
| 14: | 50B |
| 15: | 461 |
| 16: | 3DF |
| 17: | 375 |
| 18: | 311 |
| 19: | 2E3 |
| 20: | 29B |
| 21: | 254 |
| 22: | 211 |
| 23: | 1K2 |
| 24: | 1H7 |
| 25: | 1EG |
| 26: | 1C3 |
| 27: | 19J |
| 28: | 17B |
| 29: | 155 |
| 30: | 131 |
| 31: | 10U |
| 32: | UV |
| 33: | U1 |
| 34: | T5 |
| 35: | SB |
| 36: | RJ |