Is 3991 a prime number? What are the divisors of 3991?

## Parity of 3 991

3 991 is an odd number, because it is not evenly divisible by 2.

Find out more:

## Is 3 991 a perfect square number?

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 3 991 is about 63.174.

Thus, the square root of 3 991 is not an integer, and therefore 3 991 is not a square number.

## What is the square number of 3 991?

The square of a number (here 3 991) is the result of the product of this number (3 991) by itself (i.e., 3 991 × 3 991); the square of 3 991 is sometimes called "raising 3 991 to the power 2", or "3 991 squared".

The square of 3 991 is 15 928 081 because 3 991 × 3 991 = 3 9912 = 15 928 081.

As a consequence, 3 991 is the square root of 15 928 081.

## Number of digits of 3 991

3 991 is a number with 4 digits.

## What are the multiples of 3 991?

The multiples of 3 991 are all integers evenly divisible by 3 991, that is all numbers such that the remainder of the division by 3 991 is zero. There are infinitely many multiples of 3 991. The smallest multiples of 3 991 are:

## Numbers near 3 991

### Nearest numbers from 3 991

Find out whether some integer is a prime number