689 in Roman Numerals
689
DCLXXXI (subtracted)X
six hundred eighty-nine
How DCLXXXIX is formed
| Place | Value | Symbols |
|---|---|---|
| Hundreds | 600 | DC |
| Tens | 80 | LXXX |
| Units | 9 | I (subtracted)X |
| Total | 689 | DCLXXXIX |
DCLXXXIX is written one place at a time, from the largest to the smallest: DC (600) + LXXX (80) + IX (9) = 689.
IX is the only subtraction: the I before the X takes away 1, so IX = 9.
Common mistakes
Wrong: DCLXXXVIIII
Why isn't 689 written as DCLXXXVIIII?
A symbol can't be repeated four times in a row. 9 is IX (10 − 1), not VIIII, so 689 is DCLXXXIX.
Wrong: DCXXCIX
Why isn't 689 written as DCXXCIX?
Only one smaller symbol can stand before a larger one, so XXC doesn't work. 80 is LXXX (50 + 30), so 689 is DCLXXXIX.
Numbers near 689
Properties of 689
- Prime factors
- 13 × 53
- Divisors
- 1, 13, 53, 689
- Even or odd
- Odd
- Prime number
- No
- Letters in DCLXXXIX
- 8
689,000 in Roman numerals
With a bar over it (vinculum), D̅C̅L̅X̅X̅X̅I̅X̅ means 689 × 1,000 = 689,000. How Roman numerals work