900 in Roman Numerals
900
C (subtracted)M
nine hundred
How CM is formed
| Place | Value | Symbols |
|---|---|---|
| Hundreds | 900 | C (subtracted)M |
| Total | 900 | CM |
CM is a subtractive pair: C written before M means 1000 − 100 = 900.
Common mistakes
Wrong: DCCCC
Why isn't 900 written as DCCCC?
A symbol can't be repeated four times in a row. 900 is CM (1000 − 100), not DCCCC.
Numbers near 900
Properties of 900
- Prime factors
- 2² × 3² × 5²
- Divisors
- 27 divisors1, 2, 3, 4 … 900
- Even or odd
- Even
- Prime number
- No
- Letters in CM
- 2
900 is a perfect square: 30 × 30.
900,000 in Roman numerals
With a bar over it (vinculum), C̅M̅ means 900 × 1,000 = 900,000. How Roman numerals work