1089 in Roman Numerals
1089
MLXXXI (subtracted)X
one thousand eighty-nine
How MLXXXIX is formed
| Place | Value | Symbols |
|---|---|---|
| Thousands | 1000 | M |
| Tens | 80 | LXXX |
| Units | 9 | I (subtracted)X |
| Total | 1089 | MLXXXIX |
MLXXXIX is written one place at a time, from the largest to the smallest: M (1000) + LXXX (80) + IX (9) = 1089.
IX is the only subtraction: the I before the X takes away 1, so IX = 9.
Common mistakes
Wrong: MLXXXVIIII
Why isn't 1089 written as MLXXXVIIII?
A symbol can't be repeated four times in a row. 9 is IX (10 − 1), not VIIII, so 1089 is MLXXXIX.
Wrong: MXXCIX
Why isn't 1089 written as MXXCIX?
Only one smaller symbol can stand before a larger one, so XXC doesn't work. 80 is LXXX (50 + 30), so 1089 is MLXXXIX.
Numbers near 1089
Properties of 1089
- Prime factors
- 3² × 11²
- Divisors
- 1, 3, 9, 11, 33, 99, 121, 363, 1089
- Even or odd
- Odd
- Prime number
- No
- Letters in MLXXXIX
- 7
1089 is a perfect square: 33 × 33.
1,089,000 in Roman numerals
With a bar over it (vinculum), M̅L̅X̅X̅X̅I̅X̅ means 1089 × 1,000 = 1,089,000. How Roman numerals work