It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 802 998 is not a prime number.
For example, 802 998 can be divided by 2: 802 998 / 2 = 401 499.
For 802 998 to be a prime number, it would have been required that 802 998 has only two divisors, i.e., itself and 1.
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802 998 is an even number, because it is evenly divisible by 2: 802 998 / 2 = 401 499.
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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 802 998 is about 896.102.
Thus, the square root of 802 998 is not an integer, and therefore 802 998 is not a square number.
The square of a number (here 802 998) is the result of the product of this number (802 998) by itself (i.e., 802 998 × 802 998); the square of 802 998 is sometimes called "raising 802 998 to the power 2", or "802 998 squared".
The square of 802 998 is 644 805 788 004 because 802 998 × 802 998 = 802 9982 = 644 805 788 004.
As a consequence, 802 998 is the square root of 644 805 788 004.
The multiples of 802 998 are all integers evenly divisible by 802 998, that is all numbers such that the remainder of the division by 802 998 is zero. There are infinitely many multiples of 802 998. The smallest multiples of 802 998 are: