It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 8 553 089 is not a prime number.
For example, 8 553 089 can be divided by 2 467: 8 553 089 / 2467 = 3 467.
For 8 553 089 to be a prime number, it would have been required that 8 553 089 has only two divisors, i.e., itself and 1.
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8 553 089 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 8 553 089 is about 2 924.566.
Thus, the square root of 8 553 089 is not an integer, and therefore 8 553 089 is not a square number.
The square of a number (here 8 553 089) is the result of the product of this number (8 553 089) by itself (i.e., 8 553 089 × 8 553 089); the square of 8 553 089 is sometimes called "raising 8 553 089 to the power 2", or "8 553 089 squared".
The square of 8 553 089 is 73 155 331 441 921 because 8 553 089 × 8 553 089 = 8 553 0892 = 73 155 331 441 921.
As a consequence, 8 553 089 is the square root of 73 155 331 441 921.
The multiples of 8 553 089 are all integers evenly divisible by 8 553 089, that is all numbers such that the remainder of the division by 8 553 089 is zero. There are infinitely many multiples of 8 553 089. The smallest multiples of 8 553 089 are: