It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 400 163 is not a prime number.
For example, 400 163 can be divided by 17: 400 163 / 17 = 23 539.
For 400 163 to be a prime number, it would have been required that 400 163 has only two divisors, i.e., itself and 1.
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400 163 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 400 163 is about 632.584.
Thus, the square root of 400 163 is not an integer, and therefore 400 163 is not a square number.
The square of a number (here 400 163) is the result of the product of this number (400 163) by itself (i.e., 400 163 × 400 163); the square of 400 163 is sometimes called "raising 400 163 to the power 2", or "400 163 squared".
The square of 400 163 is 160 130 426 569 because 400 163 × 400 163 = 400 1632 = 160 130 426 569.
As a consequence, 400 163 is the square root of 160 130 426 569.
The multiples of 400 163 are all integers evenly divisible by 400 163, that is all numbers such that the remainder of the division by 400 163 is zero. There are infinitely many multiples of 400 163. The smallest multiples of 400 163 are: