It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 637 974 is not a prime number.
For example, 637 974 can be divided by 2: 637 974 / 2 = 318 987.
For 637 974 to be a prime number, it would have been required that 637 974 has only two divisors, i.e., itself and 1.
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637 974 is an even number, because it is evenly divisible by 2: 637 974 / 2 = 318 987.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 637 974 is about 798.733.
Thus, the square root of 637 974 is not an integer, and therefore 637 974 is not a square number.
The square of a number (here 637 974) is the result of the product of this number (637 974) by itself (i.e., 637 974 × 637 974); the square of 637 974 is sometimes called "raising 637 974 to the power 2", or "637 974 squared".
The square of 637 974 is 407 010 824 676 because 637 974 × 637 974 = 637 9742 = 407 010 824 676.
As a consequence, 637 974 is the square root of 407 010 824 676.
The multiples of 637 974 are all integers evenly divisible by 637 974, that is all numbers such that the remainder of the division by 637 974 is zero. There are infinitely many multiples of 637 974. The smallest multiples of 637 974 are: