Is 81 a square number?

The questions are: Is 81 a perfect square and 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).

There is a number that multiplied by itself will equal 81. Furthermore, the square root of 81 is a whole number. 9 x 9 = 81 and the square root of 81 is 9. 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?
Check other numbers to see if they are square.

Is 81 a prime number?
Find out if 81 is a prime number here!

Is 81 a composite number?
Find out if 81 is a composite number here!

What are the factors of 81?
See all the factors of 81 here.


















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