13 in Roman Numerals
XIII
13 in Roman numerals is XIII, and is spelled thirteen.
How to write 13 in Roman numerals
To write 13 in Roman numerals, combine X (10) and III (3) to get XIII.
The numeral XIII is read from left to right, from the largest value to the smallest, adding each symbol as you go.
| Value | Roman |
|---|---|
| 10 | X |
| 3 | III |
| 13 | XIII |
Facts about the number 13
- 13 is an odd number.
- 13 is a prime number: it has no divisors other than 1 and itself.
- The digits of 13 add up to 4.
- 13 has 2 divisors.
13 in other number systems
| Decimal | 13 |
| Roman | XIII |
| Binary | 1101 |
| Octal | 15 |
| Hexadecimal | D |
Frequently asked questions
How do you write 13 in Roman numerals?
13 is written as XIII in Roman numerals.
What does the Roman numeral XIII mean?
XIII represents the number 13 (thirteen).
Is 13 a prime number?
Yes, 13 is a prime number.
What is 13 in binary and hexadecimal?
13 is 1101 in binary and D in hexadecimal.
Related numbers
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