It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 342 729 is not a prime number.
For example, 342 729 can be divided by 3: 342 729 / 3 = 114 243.
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For 342 729 to be a prime number, it would have been required that 342 729 has only two divisors, i.e., itself and 1.
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342 729 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 342 729 is about 585.431.
Thus, the square root of 342 729 is not an integer, and therefore 342 729 is not a square number.
The square of a number (here 342 729) is the result of the product of this number (342 729) by itself (i.e., 342 729 × 342 729); the square of 342 729 is sometimes called "raising 342 729 to the power 2", or "342 729 squared".
The square of 342 729 is 117 463 167 441 because 342 729 × 342 729 = 342 7292 = 117 463 167 441.
As a consequence, 342 729 is the square root of 117 463 167 441.
The multiples of 342 729 are all integers evenly divisible by 342 729, that is all numbers such that the remainder of the division by 342 729 is zero. There are infinitely many multiples of 342 729. The smallest multiples of 342 729 are: