It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 690 738 is not a prime number.
For example, 397 690 738 can be divided by 2: 397 690 738 / 2 = 198 845 369.
For 397 690 738 to be a prime number, it would have been required that 397 690 738 has only two divisors, i.e., itself and 1.
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397 690 738 is an even number, because it is evenly divisible by 2: 397 690 738 / 2 = 198 845 369.
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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 397 690 738 is about 19 942.185.
Thus, the square root of 397 690 738 is not an integer, and therefore 397 690 738 is not a square number.
The square of a number (here 397 690 738) is the result of the product of this number (397 690 738) by itself (i.e., 397 690 738 × 397 690 738); the square of 397 690 738 is sometimes called "raising 397 690 738 to the power 2", or "397 690 738 squared".
The square of 397 690 738 is 158 157 923 090 984 640 because 397 690 738 × 397 690 738 = 397 690 7382 = 158 157 923 090 984 640.
As a consequence, 397 690 738 is the square root of 158 157 923 090 984 640.
397 690 738 is a number with 9 digits.
The multiples of 397 690 738 are all integers evenly divisible by 397 690 738, that is all numbers such that the remainder of the division by 397 690 738 is zero. There are infinitely many multiples of 397 690 738. The smallest multiples of 397 690 738 are: