139 = CXXXIX
Split 139 into 100 + 30 + 9 and write each part: C (100) + XXX (30) + IX (9) = CXXXIX.
CXXXIX uses subtraction: IX = 9. A smaller symbol before a larger one is subtracted.
| Symbol | I | V | X | L | C | D | M |
|---|---|---|---|---|---|---|---|
| Value | 1 | 5 | 10 | 50 | 100 | 500 | 1,000 |
Need another number? Use the Roman numeral converter (both directions).
| Number | Roman numeral |
|---|---|
| 135 | CXXXV |
| 136 | CXXXVI |
| 137 | CXXXVII |
| 138 | CXXXVIII |
| 140 | CXL |
| 141 | CXLI |
| 142 | CXLII |
| 143 | CXLIII |