It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 409 698 is not a prime number.
For example, 409 698 can be divided by 2: 409 698 / 2 = 204 849.
For 409 698 to be a prime number, it would have been required that 409 698 has only two divisors, i.e., itself and 1.
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409 698 is an even number, because it is evenly divisible by 2: 409 698 / 2 = 204 849.
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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 409 698 is about 640.077.
Thus, the square root of 409 698 is not an integer, and therefore 409 698 is not a square number.
The square of a number (here 409 698) is the result of the product of this number (409 698) by itself (i.e., 409 698 × 409 698); the square of 409 698 is sometimes called "raising 409 698 to the power 2", or "409 698 squared".
The square of 409 698 is 167 852 451 204 because 409 698 × 409 698 = 409 6982 = 167 852 451 204.
As a consequence, 409 698 is the square root of 167 852 451 204.
The multiples of 409 698 are all integers evenly divisible by 409 698, that is all numbers such that the remainder of the division by 409 698 is zero. There are infinitely many multiples of 409 698. The smallest multiples of 409 698 are: