It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 800 118 is not a prime number.
For example, 800 118 can be divided by 2: 800 118 / 2 = 400 059.
For 800 118 to be a prime number, it would have been required that 800 118 has only two divisors, i.e., itself and 1.
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800 118 is an even number, because it is evenly divisible by 2: 800 118 / 2 = 400 059.
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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 800 118 is about 894.493.
Thus, the square root of 800 118 is not an integer, and therefore 800 118 is not a square number.
The square of a number (here 800 118) is the result of the product of this number (800 118) by itself (i.e., 800 118 × 800 118); the square of 800 118 is sometimes called "raising 800 118 to the power 2", or "800 118 squared".
The square of 800 118 is 640 188 813 924 because 800 118 × 800 118 = 800 1182 = 640 188 813 924.
As a consequence, 800 118 is the square root of 640 188 813 924.
The multiples of 800 118 are all integers evenly divisible by 800 118, that is all numbers such that the remainder of the division by 800 118 is zero. There are infinitely many multiples of 800 118. The smallest multiples of 800 118 are: