Is 81 a perfect square or is 81 a square number?

Is 81 a square number?

Here we will answer the question: "Is 81 a square number?" You could also ask "Is 81 a perfect square?" Square number and perfect square mean the same thing.

Anyway, for 81 to be a square number, 81 must be the product of an integer multiplied by itself. In other words, the square root of 81 must equal a whole number (integer).

The square root of 81 is 9 which is an integer. Thus, 81 is a square number.

The answer to the question: "Is 81 a square number?" is Yes.
The answer to the question: "Is 81 a perfect square?" is also Yes.

Square Number?
Enter another number to see if it is a square number:

Is 82 a square number?
Find out if the next number on our list is a perfect square.