√427 = 20.6639783198. 427 is not a perfect square; the result is irrational.

Is 427 a perfect square?

No, 427 is not a perfect square. Its square root is irrational.

What is 20.6639783198 squared?

20.6639783198 squared is approximately 427. (20.6639783198)² ≈ 427

Instant answer with step-by-step solution

√427 = 20.6639783198

√427 = 20.6639783198

⚠ 427 is not a perfect square — result rounded to 10 significant figures

We need to find √427 — a number that when multiplied by itself equals 427.
427 is not a perfect square. Its square root is irrational.
It falls between √400 = 20 and √441 = 21.
Using the formula √N = N^(1/2): √427 = 427^0.5 = 20.6639783198
Verification: 20.6639783198 × 20.6639783198 ≈ 427 ✓ (rounded to 10 significant figures)

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