It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 409 702 is not a prime number.
For example, 409 702 can be divided by 2: 409 702 / 2 = 204 851.
For 409 702 to be a prime number, it would have been required that 409 702 has only two divisors, i.e., itself and 1.
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409 702 is an even number, because it is evenly divisible by 2: 409 702 / 2 = 204 851.
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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 409 702 is about 640.080.
Thus, the square root of 409 702 is not an integer, and therefore 409 702 is not a square number.
The square of a number (here 409 702) is the result of the product of this number (409 702) by itself (i.e., 409 702 × 409 702); the square of 409 702 is sometimes called "raising 409 702 to the power 2", or "409 702 squared".
The square of 409 702 is 167 855 728 804 because 409 702 × 409 702 = 409 7022 = 167 855 728 804.
As a consequence, 409 702 is the square root of 167 855 728 804.
The multiples of 409 702 are all integers evenly divisible by 409 702, that is all numbers such that the remainder of the division by 409 702 is zero. There are infinitely many multiples of 409 702. The smallest multiples of 409 702 are: