It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 239 999 988 is not a prime number.
For example, 239 999 988 can be divided by 2: 239 999 988 / 2 = 119 999 994.
For 239 999 988 to be a prime number, it would have been required that 239 999 988 has only two divisors, i.e., itself and 1.
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239 999 988 is an even number, because it is evenly divisible by 2: 239 999 988 / 2 = 119 999 994.
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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 239 999 988 is about 15 491.933.
Thus, the square root of 239 999 988 is not an integer, and therefore 239 999 988 is not a square number.
The square of a number (here 239 999 988) is the result of the product of this number (239 999 988) by itself (i.e., 239 999 988 × 239 999 988); the square of 239 999 988 is sometimes called "raising 239 999 988 to the power 2", or "239 999 988 squared".
The square of 239 999 988 is 57 599 994 240 000 144 because 239 999 988 × 239 999 988 = 239 999 9882 = 57 599 994 240 000 144.
As a consequence, 239 999 988 is the square root of 57 599 994 240 000 144.
239 999 988 is a number with 9 digits.
The multiples of 239 999 988 are all integers evenly divisible by 239 999 988, that is all numbers such that the remainder of the division by 239 999 988 is zero. There are infinitely many multiples of 239 999 988. The smallest multiples of 239 999 988 are: