It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 16 988 is not a prime number.
For example, 16 988 can be divided by 2: 16 988 / 2 = 8 494.
For 16 988 to be a prime number, it would have been required that 16 988 has only two divisors, i.e., itself and 1.
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16 988 is an even number, because it is evenly divisible by 2: 16 988 / 2 = 8 494.
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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 16 988 is about 130.338.
Thus, the square root of 16 988 is not an integer, and therefore 16 988 is not a square number.
The square of a number (here 16 988) is the result of the product of this number (16 988) by itself (i.e., 16 988 × 16 988); the square of 16 988 is sometimes called "raising 16 988 to the power 2", or "16 988 squared".
The square of 16 988 is 288 592 144 because 16 988 × 16 988 = 16 9882 = 288 592 144.
As a consequence, 16 988 is the square root of 288 592 144.
The multiples of 16 988 are all integers evenly divisible by 16 988, that is all numbers such that the remainder of the division by 16 988 is zero. There are infinitely many multiples of 16 988. The smallest multiples of 16 988 are: