It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 10 989 is not a prime number.
For example, 10 989 can be divided by 3: 10 989 / 3 = 3 663.
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For 10 989 to be a prime number, it would have been required that 10 989 has only two divisors, i.e., itself and 1.
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10 989 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 10 989 is about 104.828.
Thus, the square root of 10 989 is not an integer, and therefore 10 989 is not a square number.
The square of a number (here 10 989) is the result of the product of this number (10 989) by itself (i.e., 10 989 × 10 989); the square of 10 989 is sometimes called "raising 10 989 to the power 2", or "10 989 squared".
The square of 10 989 is 120 758 121 because 10 989 × 10 989 = 10 9892 = 120 758 121.
As a consequence, 10 989 is the square root of 120 758 121.
The multiples of 10 989 are all integers evenly divisible by 10 989, that is all numbers such that the remainder of the division by 10 989 is zero. There are infinitely many multiples of 10 989. The smallest multiples of 10 989 are: