6,991 in words
6,991
six thousand nine hundred and ninety-one
6,991 is written six thousand nine hundred and ninety-one.
Ways to write it
- As an ordinal
- six thousand nine hundred and ninety-first
- Expanded form
- 6,000 + 900 + 90 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| thousands | 6 | 6,000 |
| hundreds | 9 | 900 |
| tens | 9 | 90 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 6,991 (2 factors)
- First 10 multiples
- 6,991, 13,982, 20,973, 27,964, 34,955, 41,946, 48,937, 55,928, 62,919, 69,910
- Square
- 6,991 × 6,991 = 48,874,081
- Square root
- ≈ 83.61
- Sum of the digits
- 6 + 9 + 9 + 1 = 25
- Rounded to the nearest 10
- 6,990
- Rounded to the nearest 100
- 7,000
- Rounded to the nearest 1000
- 7,000
- Number before
- 6,990
- Number after
- 6,992
- In binary
1101101001111
Quick check
What number comes just after 6,991?
Show the answer
6,992
Is 6,991 even or odd?
Show the answer
Odd
What is 6,991 + 10?
Show the answer
7,001
Practise 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 6,991 in words?
6,991 is written "six thousand nine hundred and ninety-one".
Is 6,991 a prime number?
Yes. 6,991 is a prime number: its only factors are 1 and 6,991.
What are the factors of 6,991?
The factors of 6,991 are 1 and 6,991.