It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 298 289 is not a prime number.
For example, 298 289 can be divided by 313: 298 289 / 313 = 953.
For 298 289 to be a prime number, it would have been required that 298 289 has only two divisors, i.e., itself and 1.
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298 289 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 298 289 is about 546.158.
Thus, the square root of 298 289 is not an integer, and therefore 298 289 is not a square number.
The square of a number (here 298 289) is the result of the product of this number (298 289) by itself (i.e., 298 289 × 298 289); the square of 298 289 is sometimes called "raising 298 289 to the power 2", or "298 289 squared".
The square of 298 289 is 88 976 327 521 because 298 289 × 298 289 = 298 2892 = 88 976 327 521.
As a consequence, 298 289 is the square root of 88 976 327 521.
The multiples of 298 289 are all integers evenly divisible by 298 289, that is all numbers such that the remainder of the division by 298 289 is zero. There are infinitely many multiples of 298 289. The smallest multiples of 298 289 are: