It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 165 042 is not a prime number.
For example, 397 165 042 can be divided by 2: 397 165 042 / 2 = 198 582 521.
For 397 165 042 to be a prime number, it would have been required that 397 165 042 has only two divisors, i.e., itself and 1.
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397 165 042 is an even number, because it is evenly divisible by 2: 397 165 042 / 2 = 198 582 521.
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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 397 165 042 is about 19 929.000.
Thus, the square root of 397 165 042 is not an integer, and therefore 397 165 042 is not a square number.
The square of a number (here 397 165 042) is the result of the product of this number (397 165 042) by itself (i.e., 397 165 042 × 397 165 042); the square of 397 165 042 is sometimes called "raising 397 165 042 to the power 2", or "397 165 042 squared".
The square of 397 165 042 is 157 740 070 586 861 760 because 397 165 042 × 397 165 042 = 397 165 0422 = 157 740 070 586 861 760.
As a consequence, 397 165 042 is the square root of 157 740 070 586 861 760.
397 165 042 is a number with 9 digits.
The multiples of 397 165 042 are all integers evenly divisible by 397 165 042, that is all numbers such that the remainder of the division by 397 165 042 is zero. There are infinitely many multiples of 397 165 042. The smallest multiples of 397 165 042 are: