It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 690 697 009 is not a prime number.
For example, 690 697 009 can be divided by 257: 690 697 009 / 257 = 2 687 537.
For 690 697 009 to be a prime number, it would have been required that 690 697 009 has only two divisors, i.e., itself and 1.
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690 697 009 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 690 697 009 is about 26 281.115.
Thus, the square root of 690 697 009 is not an integer, and therefore 690 697 009 is not a square number.
The square of a number (here 690 697 009) is the result of the product of this number (690 697 009) by itself (i.e., 690 697 009 × 690 697 009); the square of 690 697 009 is sometimes called "raising 690 697 009 to the power 2", or "690 697 009 squared".
The square of 690 697 009 is 477 062 358 241 546 112 because 690 697 009 × 690 697 009 = 690 697 0092 = 477 062 358 241 546 112.
As a consequence, 690 697 009 is the square root of 477 062 358 241 546 112.
690 697 009 is a number with 9 digits.
The multiples of 690 697 009 are all integers evenly divisible by 690 697 009, that is all numbers such that the remainder of the division by 690 697 009 is zero. There are infinitely many multiples of 690 697 009. The smallest multiples of 690 697 009 are: