987 in Roman Numerals
987
C (subtracted)MLXXXVII
nine hundred eighty-seven
How CMLXXXVII is formed
| Place | Value | Symbols |
|---|---|---|
| Hundreds | 900 | C (subtracted)M |
| Tens | 80 | LXXX |
| Units | 7 | VII |
| Total | 987 | CMLXXXVII |
CMLXXXVII is written one place at a time, from the largest to the smallest: CM (900) + LXXX (80) + VII (7) = 987.
CM is the only subtraction: the C before the M takes away 100, so CM = 900.
Common mistakes
Wrong: DCCCCLXXXVII
Why isn't 987 written as DCCCCLXXXVII?
A symbol can't be repeated four times in a row. 900 is CM (1000 − 100), not DCCCC, so 987 is CMLXXXVII.
Wrong: CMXXCVII
Why isn't 987 written as CMXXCVII?
Only one smaller symbol can stand before a larger one, so XXC doesn't work. 80 is LXXX (50 + 30), so 987 is CMLXXXVII.
Numbers near 987
Properties of 987
- Prime factors
- 3 × 7 × 47
- Divisors
- 1, 3, 7, 21, 47, 141, 329, 987
- Even or odd
- Odd
- Prime number
- No
- Letters in CMLXXXVII
- 9
987,000 in Roman numerals
With a bar over it (vinculum), C̅M̅L̅X̅X̅X̅V̅I̅I̅ means 987 × 1,000 = 987,000. How Roman numerals work