It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 637 198 is not a prime number.
For example, 637 198 can be divided by 2: 637 198 / 2 = 318 599.
For 637 198 to be a prime number, it would have been required that 637 198 has only two divisors, i.e., itself and 1.
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637 198 is an even number, because it is evenly divisible by 2: 637 198 / 2 = 318 599.
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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 637 198 is about 798.247.
Thus, the square root of 637 198 is not an integer, and therefore 637 198 is not a square number.
The square of a number (here 637 198) is the result of the product of this number (637 198) by itself (i.e., 637 198 × 637 198); the square of 637 198 is sometimes called "raising 637 198 to the power 2", or "637 198 squared".
The square of 637 198 is 406 021 291 204 because 637 198 × 637 198 = 637 1982 = 406 021 291 204.
As a consequence, 637 198 is the square root of 406 021 291 204.
The multiples of 637 198 are all integers evenly divisible by 637 198, that is all numbers such that the remainder of the division by 637 198 is zero. There are infinitely many multiples of 637 198. The smallest multiples of 637 198 are: