It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 405 729 is not a prime number.
For example, 489 405 729 can be divided by 3: 489 405 729 / 3 = 163 135 243.
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For 489 405 729 to be a prime number, it would have been required that 489 405 729 has only two divisors, i.e., itself and 1.
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489 405 729 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 489 405 729 is about 22 122.516.
Thus, the square root of 489 405 729 is not an integer, and therefore 489 405 729 is not a square number.
The square of a number (here 489 405 729) is the result of the product of this number (489 405 729) by itself (i.e., 489 405 729 × 489 405 729); the square of 489 405 729 is sometimes called "raising 489 405 729 to the power 2", or "489 405 729 squared".
The square of 489 405 729 is 239 517 967 578 021 440 because 489 405 729 × 489 405 729 = 489 405 7292 = 239 517 967 578 021 440.
As a consequence, 489 405 729 is the square root of 239 517 967 578 021 440.
489 405 729 is a number with 9 digits.
The multiples of 489 405 729 are all integers evenly divisible by 489 405 729, that is all numbers such that the remainder of the division by 489 405 729 is zero. There are infinitely many multiples of 489 405 729. The smallest multiples of 489 405 729 are: