It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 427 128 is not a prime number.
For example, 489 427 128 can be divided by 2: 489 427 128 / 2 = 244 713 564.
For 489 427 128 to be a prime number, it would have been required that 489 427 128 has only two divisors, i.e., itself and 1.
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489 427 128 is an even number, because it is evenly divisible by 2: 489 427 128 / 2 = 244 713 564.
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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 489 427 128 is about 22 123.000.
Thus, the square root of 489 427 128 is not an integer, and therefore 489 427 128 is not a square number.
The square of a number (here 489 427 128) is the result of the product of this number (489 427 128) by itself (i.e., 489 427 128 × 489 427 128); the square of 489 427 128 is sometimes called "raising 489 427 128 to the power 2", or "489 427 128 squared".
The square of 489 427 128 is 239 538 913 622 328 384 because 489 427 128 × 489 427 128 = 489 427 1282 = 239 538 913 622 328 384.
As a consequence, 489 427 128 is the square root of 239 538 913 622 328 384.
489 427 128 is a number with 9 digits.
The multiples of 489 427 128 are all integers evenly divisible by 489 427 128, that is all numbers such that the remainder of the division by 489 427 128 is zero. There are infinitely many multiples of 489 427 128. The smallest multiples of 489 427 128 are: