It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 997 726 is not a prime number.
For example, 997 726 can be divided by 2: 997 726 / 2 = 498 863.
For 997 726 to be a prime number, it would have been required that 997 726 has only two divisors, i.e., itself and 1.
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997 726 is an even number, because it is evenly divisible by 2: 997 726 / 2 = 498 863.
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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 997 726 is about 998.862.
Thus, the square root of 997 726 is not an integer, and therefore 997 726 is not a square number.
The square of a number (here 997 726) is the result of the product of this number (997 726) by itself (i.e., 997 726 × 997 726); the square of 997 726 is sometimes called "raising 997 726 to the power 2", or "997 726 squared".
The square of 997 726 is 995 457 171 076 because 997 726 × 997 726 = 997 7262 = 995 457 171 076.
As a consequence, 997 726 is the square root of 995 457 171 076.
The multiples of 997 726 are all integers evenly divisible by 997 726, that is all numbers such that the remainder of the division by 997 726 is zero. There are infinitely many multiples of 997 726. The smallest multiples of 997 726 are: