It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 013 971 is not a prime number.
For example, 402 013 971 can be divided by 3: 402 013 971 / 3 = 134 004 657.
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For 402 013 971 to be a prime number, it would have been required that 402 013 971 has only two divisors, i.e., itself and 1.
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402 013 971 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 402 013 971 is about 20 050.286.
Thus, the square root of 402 013 971 is not an integer, and therefore 402 013 971 is not a square number.
The square of a number (here 402 013 971) is the result of the product of this number (402 013 971) by itself (i.e., 402 013 971 × 402 013 971); the square of 402 013 971 is sometimes called "raising 402 013 971 to the power 2", or "402 013 971 squared".
The square of 402 013 971 is 161 615 232 879 188 832 because 402 013 971 × 402 013 971 = 402 013 9712 = 161 615 232 879 188 832.
As a consequence, 402 013 971 is the square root of 161 615 232 879 188 832.
402 013 971 is a number with 9 digits.
The multiples of 402 013 971 are all integers evenly divisible by 402 013 971, that is all numbers such that the remainder of the division by 402 013 971 is zero. There are infinitely many multiples of 402 013 971. The smallest multiples of 402 013 971 are: