It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 690 497 is not a prime number.
For example, 690 497 can be divided by 823: 690 497 / 823 = 839.
For 690 497 to be a prime number, it would have been required that 690 497 has only two divisors, i.e., itself and 1.
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690 497 is an odd number, because it is not evenly divisible by 2.
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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 690 497 is about 830.961.
Thus, the square root of 690 497 is not an integer, and therefore 690 497 is not a square number.
The square of a number (here 690 497) is the result of the product of this number (690 497) by itself (i.e., 690 497 × 690 497); the square of 690 497 is sometimes called "raising 690 497 to the power 2", or "690 497 squared".
The square of 690 497 is 476 786 107 009 because 690 497 × 690 497 = 690 4972 = 476 786 107 009.
As a consequence, 690 497 is the square root of 476 786 107 009.
The multiples of 690 497 are all integers evenly divisible by 690 497, that is all numbers such that the remainder of the division by 690 497 is zero. There are infinitely many multiples of 690 497. The smallest multiples of 690 497 are: