It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 13 979 is not a prime number.
For example, 13 979 can be divided by 7: 13 979 / 7 = 1 997.
For 13 979 to be a prime number, it would have been required that 13 979 has only two divisors, i.e., itself and 1.
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13 979 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 13 979 is about 118.233.
Thus, the square root of 13 979 is not an integer, and therefore 13 979 is not a square number.
The square of a number (here 13 979) is the result of the product of this number (13 979) by itself (i.e., 13 979 × 13 979); the square of 13 979 is sometimes called "raising 13 979 to the power 2", or "13 979 squared".
The square of 13 979 is 195 412 441 because 13 979 × 13 979 = 13 9792 = 195 412 441.
As a consequence, 13 979 is the square root of 195 412 441.
The multiples of 13 979 are all integers evenly divisible by 13 979, that is all numbers such that the remainder of the division by 13 979 is zero. There are infinitely many multiples of 13 979. The smallest multiples of 13 979 are: