It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 270 243 is not a prime number.
For example, 270 243 can be divided by 3: 270 243 / 3 = 90 081.
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For 270 243 to be a prime number, it would have been required that 270 243 has only two divisors, i.e., itself and 1.
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270 243 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 270 243 is about 519.849.
Thus, the square root of 270 243 is not an integer, and therefore 270 243 is not a square number.
The square of a number (here 270 243) is the result of the product of this number (270 243) by itself (i.e., 270 243 × 270 243); the square of 270 243 is sometimes called "raising 270 243 to the power 2", or "270 243 squared".
The square of 270 243 is 73 031 279 049 because 270 243 × 270 243 = 270 2432 = 73 031 279 049.
As a consequence, 270 243 is the square root of 73 031 279 049.
The multiples of 270 243 are all integers evenly divisible by 270 243, that is all numbers such that the remainder of the division by 270 243 is zero. There are infinitely many multiples of 270 243. The smallest multiples of 270 243 are: