It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 662 078 is not a prime number.
For example, 397 662 078 can be divided by 2: 397 662 078 / 2 = 198 831 039.
For 397 662 078 to be a prime number, it would have been required that 397 662 078 has only two divisors, i.e., itself and 1.
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397 662 078 is an even number, because it is evenly divisible by 2: 397 662 078 / 2 = 198 831 039.
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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 397 662 078 is about 19 941.466.
Thus, the square root of 397 662 078 is not an integer, and therefore 397 662 078 is not a square number.
The square of a number (here 397 662 078) is the result of the product of this number (397 662 078) by itself (i.e., 397 662 078 × 397 662 078); the square of 397 662 078 is sometimes called "raising 397 662 078 to the power 2", or "397 662 078 squared".
The square of 397 662 078 is 158 135 128 279 278 080 because 397 662 078 × 397 662 078 = 397 662 0782 = 158 135 128 279 278 080.
As a consequence, 397 662 078 is the square root of 158 135 128 279 278 080.
397 662 078 is a number with 9 digits.
The multiples of 397 662 078 are all integers evenly divisible by 397 662 078, that is all numbers such that the remainder of the division by 397 662 078 is zero. There are infinitely many multiples of 397 662 078. The smallest multiples of 397 662 078 are: