823 in words
823
eight hundred twenty-three
823 is written eight hundred twenty-three.
Ways to write it
- As an ordinal
- eight hundred twenty-third
- Roman numeral
- DCCCXXIII
- Expanded form
- 800 + 20 + 3
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 8 | 800 |
| tens | 2 | 20 |
| ones | 3 | 3 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 823 (2 factors)
- First 10 multiples
- 823, 1,646, 2,469, 3,292, 4,115, 4,938, 5,761, 6,584, 7,407, 8,230
- Square
- 823 × 823 = 677,329
- Square root
- ≈ 28.69
- Sum of the digits
- 8 + 2 + 3 = 13
- Rounded to the nearest 10
- 820
- Rounded to the nearest 100
- 800
- Number before
- 822
- Number after
- 824
- In binary
1100110111
Quick check
What number comes just after 823?
Show the answer
824
Is 823 even or odd?
Show the answer
Odd
What is 823 + 10?
Show the answer
833
Practise 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 823 in words?
823 is written "eight hundred twenty-three".
Is 823 a prime number?
Yes. 823 is a prime number: its only factors are 1 and 823.
What are the factors of 823?
The factors of 823 are 1 and 823.
How do you write 823 in Roman numerals?
823 in Roman numerals is DCCCXXIII.