It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 262 is not a prime number.
For example, 998 262 can be divided by 2: 998 262 / 2 = 499 131.
For 998 262 to be a prime number, it would have been required that 998 262 has only two divisors, i.e., itself and 1.
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998 262 is an even number, because it is evenly divisible by 2: 998 262 / 2 = 499 131.
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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 998 262 is about 999.131.
Thus, the square root of 998 262 is not an integer, and therefore 998 262 is not a square number.
The square of a number (here 998 262) is the result of the product of this number (998 262) by itself (i.e., 998 262 × 998 262); the square of 998 262 is sometimes called "raising 998 262 to the power 2", or "998 262 squared".
The square of 998 262 is 996 527 020 644 because 998 262 × 998 262 = 998 2622 = 996 527 020 644.
As a consequence, 998 262 is the square root of 996 527 020 644.
The multiples of 998 262 are all integers evenly divisible by 998 262, that is all numbers such that the remainder of the division by 998 262 is zero. There are infinitely many multiples of 998 262. The smallest multiples of 998 262 are: