It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 7 138 972 is not a prime number.
For example, 7 138 972 can be divided by 2: 7 138 972 / 2 = 3 569 486.
For 7 138 972 to be a prime number, it would have been required that 7 138 972 has only two divisors, i.e., itself and 1.
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7 138 972 is an even number, because it is evenly divisible by 2: 7 138 972 / 2 = 3 569 486.
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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 7 138 972 is about 2 671.885.
Thus, the square root of 7 138 972 is not an integer, and therefore 7 138 972 is not a square number.
The square of a number (here 7 138 972) is the result of the product of this number (7 138 972) by itself (i.e., 7 138 972 × 7 138 972); the square of 7 138 972 is sometimes called "raising 7 138 972 to the power 2", or "7 138 972 squared".
The square of 7 138 972 is 50 964 921 216 784 because 7 138 972 × 7 138 972 = 7 138 9722 = 50 964 921 216 784.
As a consequence, 7 138 972 is the square root of 50 964 921 216 784.
The multiples of 7 138 972 are all integers evenly divisible by 7 138 972, that is all numbers such that the remainder of the division by 7 138 972 is zero. There are infinitely many multiples of 7 138 972. The smallest multiples of 7 138 972 are: