Number
709 in Roman numerals
709 is written DCCIX
Type any other number or numeral below to convert it.
Above 3,999? Type the barred part in brackets, e.g. (IV)CC = 4,200.
How DCCIX is built
Roman numerals are written one decimal place at a time, largest first.
- DCChundreds · 7D (500) plus CC (200) makes 700.
- IXones · 9I before X means 10 − 1 = 9. This saves writing VIIII.
700 + 9 = 709
The pair IX uses subtraction: a smaller letter before a larger one is taken away from it. Only six pairs work this way: IV, IX, XL, XC, CD and CM. More on subtraction
Mistakes to avoid
- Not DCCVIIII (8 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today DCCIX (5 letters) is the standard.
- There's no letter for zero. The zero is simply left out, which is why 709 has 2 parts, not 3.
About the number 709
- 709 is a prime number: only 1 and 709 divide it exactly.
- DCCIX has 5 letters. 604 of the numbers up to 1,000 have longer numerals.
Counting from 701 to 710
Every number from 701 to 710 starts DCC (700); only the ending changes.
| Number | Roman numeral |
|---|---|
| 701 | DCCI |
| 702 | DCCII |
| 703 | DCCIII |
| 704 | DCCIV |
| 705 | DCCV |
| 706 | DCCVI |
| 707 | DCCVII |
| 708 | DCCVIII |
| 709 | DCCIX |
| 710 | DCCX |