It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 398 960 697 is not a prime number.
For example, 398 960 697 can be divided by 3: 398 960 697 / 3 = 132 986 899.
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For 398 960 697 to be a prime number, it would have been required that 398 960 697 has only two divisors, i.e., itself and 1.
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398 960 697 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 398 960 697 is about 19 974.001.
Thus, the square root of 398 960 697 is not an integer, and therefore 398 960 697 is not a square number.
The square of a number (here 398 960 697) is the result of the product of this number (398 960 697) by itself (i.e., 398 960 697 × 398 960 697); the square of 398 960 697 is sometimes called "raising 398 960 697 to the power 2", or "398 960 697 squared".
The square of 398 960 697 is 159 169 637 750 725 824 because 398 960 697 × 398 960 697 = 398 960 6972 = 159 169 637 750 725 824.
As a consequence, 398 960 697 is the square root of 159 169 637 750 725 824.
398 960 697 is a number with 9 digits.
The multiples of 398 960 697 are all integers evenly divisible by 398 960 697, that is all numbers such that the remainder of the division by 398 960 697 is zero. There are infinitely many multiples of 398 960 697. The smallest multiples of 398 960 697 are: