4,991 in words
4,991
four thousand nine hundred ninety-one
4,991 is written four thousand nine hundred ninety-one.
Ways to write it
- As an ordinal
- four thousand nine hundred ninety-first
- Expanded form
- 4,000 + 900 + 90 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| thousands | 4 | 4,000 |
| hundreds | 9 | 900 |
| tens | 9 | 90 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 7, 23, 31, 161, 217, 713 and 4,991 (8 factors)
- First 10 multiples
- 4,991, 9,982, 14,973, 19,964, 24,955, 29,946, 34,937, 39,928, 44,919, 49,910
- Square
- 4,991 × 4,991 = 24,910,081
- Square root
- ≈ 70.65
- Sum of the digits
- 4 + 9 + 9 + 1 = 23
- Rounded to the nearest 10
- 4,990
- Rounded to the nearest 100
- 5,000
- Rounded to the nearest 1000
- 5,000
- Number before
- 4,990
- Number after
- 4,992
- In binary
1001101111111
Quick check
What number comes just after 4,991?
Show the answer
4,992
Is 4,991 even or odd?
Show the answer
Odd
What is 4,991 + 10?
Show the answer
5,001
Practice with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
Find the missing number in a sequence.Frequently asked questions
How do you write 4,991 in words?
4,991 is written "four thousand nine hundred ninety-one".
Is 4,991 a prime number?
No. 4,991 is a composite number, because it has more than two factors.
What are the factors of 4,991?
The factors of 4,991 are 1, 7, 23, 31, 161, 217, 713 and 4,991.