It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 708 216 is not a prime number.
For example, 708 216 can be divided by 2: 708 216 / 2 = 354 108.
For 708 216 to be a prime number, it would have been required that 708 216 has only two divisors, i.e., itself and 1.
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708 216 is an even number, because it is evenly divisible by 2: 708 216 / 2 = 354 108.
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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 708 216 is about 841.556.
Thus, the square root of 708 216 is not an integer, and therefore 708 216 is not a square number.
The square of a number (here 708 216) is the result of the product of this number (708 216) by itself (i.e., 708 216 × 708 216); the square of 708 216 is sometimes called "raising 708 216 to the power 2", or "708 216 squared".
The square of 708 216 is 501 569 902 656 because 708 216 × 708 216 = 708 2162 = 501 569 902 656.
As a consequence, 708 216 is the square root of 501 569 902 656.
The multiples of 708 216 are all integers evenly divisible by 708 216, that is all numbers such that the remainder of the division by 708 216 is zero. There are infinitely many multiples of 708 216. The smallest multiples of 708 216 are: