It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 688 738 002 is not a prime number.
For example, 688 738 002 can be divided by 2: 688 738 002 / 2 = 344 369 001.
For 688 738 002 to be a prime number, it would have been required that 688 738 002 has only two divisors, i.e., itself and 1.
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688 738 002 is an even number, because it is evenly divisible by 2: 688 738 002 / 2 = 344 369 001.
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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 688 738 002 is about 26 243.818.
Thus, the square root of 688 738 002 is not an integer, and therefore 688 738 002 is not a square number.
The square of a number (here 688 738 002) is the result of the product of this number (688 738 002) by itself (i.e., 688 738 002 × 688 738 002); the square of 688 738 002 is sometimes called "raising 688 738 002 to the power 2", or "688 738 002 squared".
The square of 688 738 002 is 474 360 035 398 952 000 because 688 738 002 × 688 738 002 = 688 738 0022 = 474 360 035 398 952 000.
As a consequence, 688 738 002 is the square root of 474 360 035 398 952 000.
688 738 002 is a number with 9 digits.
The multiples of 688 738 002 are all integers evenly divisible by 688 738 002, that is all numbers such that the remainder of the division by 688 738 002 is zero. There are infinitely many multiples of 688 738 002. The smallest multiples of 688 738 002 are: