It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 800 102 is not a prime number.
For example, 800 102 can be divided by 2: 800 102 / 2 = 400 051.
For 800 102 to be a prime number, it would have been required that 800 102 has only two divisors, i.e., itself and 1.
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800 102 is an even number, because it is evenly divisible by 2: 800 102 / 2 = 400 051.
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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 800 102 is about 894.484.
Thus, the square root of 800 102 is not an integer, and therefore 800 102 is not a square number.
The square of a number (here 800 102) is the result of the product of this number (800 102) by itself (i.e., 800 102 × 800 102); the square of 800 102 is sometimes called "raising 800 102 to the power 2", or "800 102 squared".
The square of 800 102 is 640 163 210 404 because 800 102 × 800 102 = 800 1022 = 640 163 210 404.
As a consequence, 800 102 is the square root of 640 163 210 404.
The multiples of 800 102 are all integers evenly divisible by 800 102, that is all numbers such that the remainder of the division by 800 102 is zero. There are infinitely many multiples of 800 102. The smallest multiples of 800 102 are: