## Is 7921 a prime number?

No, 7921 is not a prime number.

For example, 7921 can be divided by 89: 7921 / 89 = 89.

To be 7921 a prime number, it would have been required that 7921 has only two divisors, i.e., itself and 1.

## Parity of 7921

7921 is an odd number, because it is not evenly divisible by 2.

## Is 7921 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 7921 is 89.

Therefore, the square root of 7921 is an integer, and as a consequence 7921 is a perfect square.

As a consequence, 89 is the square root of 7921.

## What is the square number of 7921?

The square of a number (here 7921) is the result of the product of this number (7921) by itself (i.e., 7921 × 7921); the square of 7921 is sometimes called "raising 7921 to the power 2", or "7921 squared".

The square of 7921 is 62 742 241 because 7921 × 7921 = 7921^{2} = 62 742 241.

As a consequence, 7921 is the square root of 62 742 241.

## Number of digits of 7921

7921 is a number with 4 digits.

## What are the multiples of 7921?

The multiples of 7921 are all integers evenly divisible by 7921, that is all numbers such that the remainder of the division by 7921 is zero. There are infinitely many multiples of 7921. The smallest multiples of 7921 are:

- 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 7921 too, since 0 × 7921 = 0
- 7921: indeed, 7921 is a multiple of itself, since 7921 is evenly divisible by 7921 (we have 7921 / 7921 = 1, so the remainder of this division is indeed zero)
- 15 842: indeed, 15 842 = 7921 × 2
- 23 763: indeed, 23 763 = 7921 × 3
- 31 684: indeed, 31 684 = 7921 × 4
- 39 605: indeed, 39 605 = 7921 × 5
- etc.