It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 690 704 is not a prime number.
For example, 690 704 can be divided by 2: 690 704 / 2 = 345 352.
For 690 704 to be a prime number, it would have been required that 690 704 has only two divisors, i.e., itself and 1.
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690 704 is an even number, because it is evenly divisible by 2: 690 704 / 2 = 345 352.
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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 690 704 is about 831.086.
Thus, the square root of 690 704 is not an integer, and therefore 690 704 is not a square number.
The square of a number (here 690 704) is the result of the product of this number (690 704) by itself (i.e., 690 704 × 690 704); the square of 690 704 is sometimes called "raising 690 704 to the power 2", or "690 704 squared".
The square of 690 704 is 477 072 015 616 because 690 704 × 690 704 = 690 7042 = 477 072 015 616.
As a consequence, 690 704 is the square root of 477 072 015 616.
The multiples of 690 704 are all integers evenly divisible by 690 704, that is all numbers such that the remainder of the division by 690 704 is zero. There are infinitely many multiples of 690 704. The smallest multiples of 690 704 are: