It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 802 097 is not a prime number.
For example, 802 097 can be divided by 257: 802 097 / 257 = 3 121.
For 802 097 to be a prime number, it would have been required that 802 097 has only two divisors, i.e., itself and 1.
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802 097 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 802 097 is about 895.599.
Thus, the square root of 802 097 is not an integer, and therefore 802 097 is not a square number.
The square of a number (here 802 097) is the result of the product of this number (802 097) by itself (i.e., 802 097 × 802 097); the square of 802 097 is sometimes called "raising 802 097 to the power 2", or "802 097 squared".
The square of 802 097 is 643 359 597 409 because 802 097 × 802 097 = 802 0972 = 643 359 597 409.
As a consequence, 802 097 is the square root of 643 359 597 409.
The multiples of 802 097 are all integers evenly divisible by 802 097, that is all numbers such that the remainder of the division by 802 097 is zero. There are infinitely many multiples of 802 097. The smallest multiples of 802 097 are: