It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 061 is not a prime number.
For example, 998 061 can be divided by 3: 998 061 / 3 = 332 687.
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For 998 061 to be a prime number, it would have been required that 998 061 has only two divisors, i.e., itself and 1.
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998 061 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 998 061 is about 999.030.
Thus, the square root of 998 061 is not an integer, and therefore 998 061 is not a square number.
The square of a number (here 998 061) is the result of the product of this number (998 061) by itself (i.e., 998 061 × 998 061); the square of 998 061 is sometimes called "raising 998 061 to the power 2", or "998 061 squared".
The square of 998 061 is 996 125 759 721 because 998 061 × 998 061 = 998 0612 = 996 125 759 721.
As a consequence, 998 061 is the square root of 996 125 759 721.
The multiples of 998 061 are all integers evenly divisible by 998 061, that is all numbers such that the remainder of the division by 998 061 is zero. There are infinitely many multiples of 998 061. The smallest multiples of 998 061 are: