It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 361 243 is not a prime number.
For example, 361 243 can be divided by 31: 361 243 / 31 = 11 653.
For 361 243 to be a prime number, it would have been required that 361 243 has only two divisors, i.e., itself and 1.
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361 243 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 361 243 is about 601.035.
Thus, the square root of 361 243 is not an integer, and therefore 361 243 is not a square number.
The square of a number (here 361 243) is the result of the product of this number (361 243) by itself (i.e., 361 243 × 361 243); the square of 361 243 is sometimes called "raising 361 243 to the power 2", or "361 243 squared".
The square of 361 243 is 130 496 505 049 because 361 243 × 361 243 = 361 2432 = 130 496 505 049.
As a consequence, 361 243 is the square root of 130 496 505 049.
The multiples of 361 243 are all integers evenly divisible by 361 243, that is all numbers such that the remainder of the division by 361 243 is zero. There are infinitely many multiples of 361 243. The smallest multiples of 361 243 are: