How to write 117 in Roman numerals
Roman numerals are built place by place, from the largest value to the smallest. For 117 the places are 100 (hundreds), 10 (tens), 7 (ones).
- Write 100 as
C. - Write 10 as
X. - Write 7 as
VII.
Joined together, C + X + VII gives CXVII.
117 digit by digit
| Place | Value | Numeral | Rule used |
|---|---|---|---|
| hundreds | 100 | C | one symbol |
| tens | 10 | X | one symbol |
| ones | 7 | VII | the five symbol plus two |
Check CXVII by reading it back
Reading CXVII from left to right and adding the pieces: C = 100, X = 10, VII = 7. Together that is 100 + 10 + 7 = 117, so CXVII and 117 match.
Mistakes to avoid with CXVII
- Never repeat a symbol more than three times in a row. When a fourth would be needed, the subtractive form takes over.
- Only I, X and C may be placed before a larger symbol to subtract, so CXVII never contains forms such as VX or LC.
- Read CXVII as one number, not letter by letter: add the values left to right, except where a smaller symbol sits before a larger one.
Facts about the number 117
- 117 is an odd number and composite, with prime factors 32 x 13.
- In binary 117 is
1110101and in hexadecimal it is75. - Written out, 117 is "one hundred seventeen".
- The digits of 117 add up to 9, so it is divisible by 3.
Where you will see 117 in Roman numerals
A comprehensive encyclopedia volume covering entries near the end of the alphabet might be labeled volume 117, or CXVII. Publishers use Roman numerals on book spines to give multi volume sets a uniform and authoritative appearance.
Numbers near 117
FAQ
What is 117 in Roman numerals?
117 is written CXVII in Roman numerals. It is built from C (100), X (10), VII (7).
How do you write 117 in lowercase Roman numerals?
Lowercase Roman numerals use the same rules, so 117 is cxvii. Lowercase is common for page numbers in a book's preface and for outline levels.
How do I convert any number to Roman numerals?
Split the number into thousands, hundreds, tens and ones, write each part with the symbols I, V, X, L, C, D and M, then join them from largest to smallest. Or paste it into the Roman numeral converter, which also converts back.
More roman numerals
- 116 (CXVI): previous page
- 119 (CXIX): next page
- Roman numerals chart: the full list