429 in Roman Numerals
429
C (subtracted)DXXI (subtracted)X
four hundred twenty-nine
How CDXXIX is formed
| Place | Value | Symbols |
|---|---|---|
| Hundreds | 400 | C (subtracted)D |
| Tens | 20 | XX |
| Units | 9 | I (subtracted)X |
| Total | 429 | CDXXIX |
CDXXIX is written one place at a time, from the largest to the smallest: CD (400) + XX (20) + IX (9) = 429.
CD and IX are subtractive pairs: in each one the smaller symbol comes first and is taken away.
Common mistakes
Wrong: CCCCXXIX
Why isn't 429 written as CCCCXXIX?
A symbol can't be repeated four times in a row. 400 is CD (500 − 100), not CCCC, so 429 is CDXXIX.
Wrong: CDXXVIIII
Why isn't 429 written as CDXXVIIII?
A symbol can't be repeated four times in a row. 9 is IX (10 − 1), not VIIII, so 429 is CDXXIX.
Wrong: CCCCXXVIIII
Why isn't 429 written as CCCCXXVIIII?
No symbol can be repeated four times in a row, so CCCC and VIIII are not used: 400 = CD, 9 = IX. Together they make CDXXIX.
Numbers near 429
Properties of 429
- Prime factors
- 3 × 11 × 13
- Divisors
- 1, 3, 11, 13, 33, 39, 143, 429
- Even or odd
- Odd
- Prime number
- No
- Letters in CDXXIX
- 6
429,000 in Roman numerals
With a bar over it (vinculum), C̅D̅X̅X̅I̅X̅ means 429 × 1,000 = 429,000. How Roman numerals work