It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 720 674 is not a prime number.
For example, 720 674 can be divided by 2: 720 674 / 2 = 360 337.
For 720 674 to be a prime number, it would have been required that 720 674 has only two divisors, i.e., itself and 1.
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720 674 is an even number, because it is evenly divisible by 2: 720 674 / 2 = 360 337.
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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 720 674 is about 848.925.
Thus, the square root of 720 674 is not an integer, and therefore 720 674 is not a square number.
The square of a number (here 720 674) is the result of the product of this number (720 674) by itself (i.e., 720 674 × 720 674); the square of 720 674 is sometimes called "raising 720 674 to the power 2", or "720 674 squared".
The square of 720 674 is 519 371 014 276 because 720 674 × 720 674 = 720 6742 = 519 371 014 276.
As a consequence, 720 674 is the square root of 519 371 014 276.
The multiples of 720 674 are all integers evenly divisible by 720 674, that is all numbers such that the remainder of the division by 720 674 is zero. There are infinitely many multiples of 720 674. The smallest multiples of 720 674 are: