343 in words
343
three hundred forty-three
343 is written three hundred forty-three.
Ways to write it
- As an ordinal
- three hundred forty-third
- Roman numeral
- CCCXLIII
- Expanded form
- 300 + 40 + 3
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 3 | 300 |
| tens | 4 | 40 |
| ones | 3 | 3 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 7, 49 and 343 (4 factors)
- First 10 multiples
- 343, 686, 1,029, 1,372, 1,715, 2,058, 2,401, 2,744, 3,087, 3,430
- Square
- 343 × 343 = 117,649
- Square root
- ≈ 18.52
- Cube root
- 7
- Sum of the digits
- 3 + 4 + 3 = 10
- Rounded to the nearest 10
- 340
- Rounded to the nearest 100
- 300
- Number before
- 342
- Number after
- 344
- In binary
101010111
Quick check
What number comes just after 343?
Show the answer
344
Is 343 even or odd?
Show the answer
Odd
What is 343 + 10?
Show the answer
353
Practice with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Roman Numerals
Read and write Roman numerals from I to 3,999.Frequently asked questions
How do you write 343 in words?
343 is written "three hundred forty-three".
Is 343 a prime number?
No. 343 is a composite number, because it has more than two factors.
What are the factors of 343?
The factors of 343 are 1, 7, 49 and 343.
How do you write 343 in Roman numerals?
343 in Roman numerals is CCCXLIII.