It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 990 948 is not a prime number.
For example, 990 948 can be divided by 2: 990 948 / 2 = 495 474.
For 990 948 to be a prime number, it would have been required that 990 948 has only two divisors, i.e., itself and 1.
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990 948 is an even number, because it is evenly divisible by 2: 990 948 / 2 = 495 474.
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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 990 948 is about 995.464.
Thus, the square root of 990 948 is not an integer, and therefore 990 948 is not a square number.
The square of a number (here 990 948) is the result of the product of this number (990 948) by itself (i.e., 990 948 × 990 948); the square of 990 948 is sometimes called "raising 990 948 to the power 2", or "990 948 squared".
The square of 990 948 is 981 977 938 704 because 990 948 × 990 948 = 990 9482 = 981 977 938 704.
As a consequence, 990 948 is the square root of 981 977 938 704.
The multiples of 990 948 are all integers evenly divisible by 990 948, that is all numbers such that the remainder of the division by 990 948 is zero. There are infinitely many multiples of 990 948. The smallest multiples of 990 948 are: