It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 990 629 is not a prime number.
For example, 990 629 can be divided by 569: 990 629 / 569 = 1 741.
For 990 629 to be a prime number, it would have been required that 990 629 has only two divisors, i.e., itself and 1.
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990 629 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 990 629 is about 995.303.
Thus, the square root of 990 629 is not an integer, and therefore 990 629 is not a square number.
The square of a number (here 990 629) is the result of the product of this number (990 629) by itself (i.e., 990 629 × 990 629); the square of 990 629 is sometimes called "raising 990 629 to the power 2", or "990 629 squared".
The square of 990 629 is 981 345 815 641 because 990 629 × 990 629 = 990 6292 = 981 345 815 641.
As a consequence, 990 629 is the square root of 981 345 815 641.
The multiples of 990 629 are all integers evenly divisible by 990 629, that is all numbers such that the remainder of the division by 990 629 is zero. There are infinitely many multiples of 990 629. The smallest multiples of 990 629 are: