It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 4 999 979 is not a prime number.
For example, 4 999 979 can be divided by 157: 4 999 979 / 157 = 31 847.
For 4 999 979 to be a prime number, it would have been required that 4 999 979 has only two divisors, i.e., itself and 1.
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4 999 979 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 4 999 979 is about 2 236.063.
Thus, the square root of 4 999 979 is not an integer, and therefore 4 999 979 is not a square number.
The square of a number (here 4 999 979) is the result of the product of this number (4 999 979) by itself (i.e., 4 999 979 × 4 999 979); the square of 4 999 979 is sometimes called "raising 4 999 979 to the power 2", or "4 999 979 squared".
The square of 4 999 979 is 24 999 790 000 441 because 4 999 979 × 4 999 979 = 4 999 9792 = 24 999 790 000 441.
As a consequence, 4 999 979 is the square root of 24 999 790 000 441.
The multiples of 4 999 979 are all integers evenly divisible by 4 999 979, that is all numbers such that the remainder of the division by 4 999 979 is zero. There are infinitely many multiples of 4 999 979. The smallest multiples of 4 999 979 are: