Square Root Calculator › Square root of 639
Square Root of 639
√639 ≈ 25.278449
639 is not a perfect square, so √639 is an irrational number that is approximately 25.278449. In simplified radical form, √639 = 3√71.
√639 lies between √625 = 25 and √676 = 26.
| Number | 639 |
| Square root (decimal) | 25.278449 |
| Simplified radical | 3√71 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 639 a perfect square?
No, 639 is not a perfect square, so its square root is irrational and approximately 25.278449.
What is the square root of 639 in simplest radical form?
√639 = 3√71 in simplest radical form.