It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 168 729 is not a prime number.
For example, 168 729 can be divided by 3: 168 729 / 3 = 56 243.
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For 168 729 to be a prime number, it would have been required that 168 729 has only two divisors, i.e., itself and 1.
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168 729 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 168 729 is about 410.766.
Thus, the square root of 168 729 is not an integer, and therefore 168 729 is not a square number.
The square of a number (here 168 729) is the result of the product of this number (168 729) by itself (i.e., 168 729 × 168 729); the square of 168 729 is sometimes called "raising 168 729 to the power 2", or "168 729 squared".
The square of 168 729 is 28 469 475 441 because 168 729 × 168 729 = 168 7292 = 28 469 475 441.
As a consequence, 168 729 is the square root of 28 469 475 441.
The multiples of 168 729 are all integers evenly divisible by 168 729, that is all numbers such that the remainder of the division by 168 729 is zero. There are infinitely many multiples of 168 729. The smallest multiples of 168 729 are: