"What is 639 to the 2nd power? (What is Six hundred thirty-nine to the second power?)" is the math problem we are solving here. In mathematical terms, 639 is the base and 2 is the exponent as follows:
6392
The problem above (639 to the 2nd power) means that you multiply 639 by itself. In other words, 639 × 639. When we do that, we get the answer as follows:
408,321
2nd Power Calculator
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