It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 9 978 078 is not a prime number.
For example, 9 978 078 can be divided by 2: 9 978 078 / 2 = 4 989 039.
For 9 978 078 to be a prime number, it would have been required that 9 978 078 has only two divisors, i.e., itself and 1.
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9 978 078 is an even number, because it is evenly divisible by 2: 9 978 078 / 2 = 4 989 039.
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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 9 978 078 is about 3 158.810.
Thus, the square root of 9 978 078 is not an integer, and therefore 9 978 078 is not a square number.
The square of a number (here 9 978 078) is the result of the product of this number (9 978 078) by itself (i.e., 9 978 078 × 9 978 078); the square of 9 978 078 is sometimes called "raising 9 978 078 to the power 2", or "9 978 078 squared".
The square of 9 978 078 is 99 562 040 574 084 because 9 978 078 × 9 978 078 = 9 978 0782 = 99 562 040 574 084.
As a consequence, 9 978 078 is the square root of 99 562 040 574 084.
The multiples of 9 978 078 are all integers evenly divisible by 9 978 078, that is all numbers such that the remainder of the division by 9 978 078 is zero. There are infinitely many multiples of 9 978 078. The smallest multiples of 9 978 078 are: