It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 720 698 is not a prime number.
For example, 720 698 can be divided by 2: 720 698 / 2 = 360 349.
For 720 698 to be a prime number, it would have been required that 720 698 has only two divisors, i.e., itself and 1.
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720 698 is an even number, because it is evenly divisible by 2: 720 698 / 2 = 360 349.
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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 720 698 is about 848.939.
Thus, the square root of 720 698 is not an integer, and therefore 720 698 is not a square number.
The square of a number (here 720 698) is the result of the product of this number (720 698) by itself (i.e., 720 698 × 720 698); the square of 720 698 is sometimes called "raising 720 698 to the power 2", or "720 698 squared".
The square of 720 698 is 519 405 607 204 because 720 698 × 720 698 = 720 6982 = 519 405 607 204.
As a consequence, 720 698 is the square root of 519 405 607 204.
The multiples of 720 698 are all integers evenly divisible by 720 698, that is all numbers such that the remainder of the division by 720 698 is zero. There are infinitely many multiples of 720 698. The smallest multiples of 720 698 are: