What number multiplied by itself equals 639?

Here we will answer: What number multiplied by itself gives 639? In other words, what number times itself will equal 639?

We have identified many different ways of getting the answer to this question:

Algebra Method:
Make an algebra equation and solve for x:

x • x = 639
x ≈ 25.278

Square Root Method:
Take the square root of 639 to get the answer:

√639 ≈ 25.278

Exponent Method:
Make the base 639 and the exponent 0.5 to get the answer:

639^0.5 ≈ 25.278

There you go! Now you know how to calculate "What number multiplied by itself equals 639?"

The bottom line is that 25.278 times itself equals approximately 639 as illustrated here:

25.278 x 25.278 ≈ 639

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The answer on this page is rounded to the nearest thousandth, if necessary.