Number
179 in Roman numerals
179 is written CLXXIX
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 CLXXIX is built
Roman numerals are written one decimal place at a time, largest first.
- Chundreds · 1C is 100.
- LXXtens · 7L (50) plus XX (20) makes 70.
- IXones · 9I before X means 10 − 1 = 9. This saves writing VIIII.
100 + 70 + 9 = 179
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 CLXXVIIII (9 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today CLXXIX (6 letters) is the standard.
About the number 179
- 179 is a prime number: only 1 and 179 divide it exactly.
- CLXXIX has 6 letters. 396 of the numbers up to 1,000 have longer numerals.
Counting from 171 to 180
Every number from 171 to 180 starts CLXX (170); only the ending changes.
| Number | Roman numeral |
|---|---|
| 171 | CLXXI |
| 172 | CLXXII |
| 173 | CLXXIII |
| 174 | CLXXIV |
| 175 | CLXXV |
| 176 | CLXXVI |
| 177 | CLXXVII |
| 178 | CLXXVIII |
| 179 | CLXXIX |
| 180 | CLXXX |