It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 389 988 is not a prime number.
For example, 165 389 988 can be divided by 2: 165 389 988 / 2 = 82 694 994.
For 165 389 988 to be a prime number, it would have been required that 165 389 988 has only two divisors, i.e., itself and 1.
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165 389 988 is an even number, because it is evenly divisible by 2: 165 389 988 / 2 = 82 694 994.
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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 165 389 988 is about 12 860.404.
Thus, the square root of 165 389 988 is not an integer, and therefore 165 389 988 is not a square number.
The square of a number (here 165 389 988) is the result of the product of this number (165 389 988) by itself (i.e., 165 389 988 × 165 389 988); the square of 165 389 988 is sometimes called "raising 165 389 988 to the power 2", or "165 389 988 squared".
The square of 165 389 988 is 27 353 848 130 640 144 because 165 389 988 × 165 389 988 = 165 389 9882 = 27 353 848 130 640 144.
As a consequence, 165 389 988 is the square root of 27 353 848 130 640 144.
165 389 988 is a number with 9 digits.
The multiples of 165 389 988 are all integers evenly divisible by 165 389 988, that is all numbers such that the remainder of the division by 165 389 988 is zero. There are infinitely many multiples of 165 389 988. The smallest multiples of 165 389 988 are: