It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 263 263 is not a prime number.
For example, 263 263 can be divided by 7: 263 263 / 7 = 37 609.
For 263 263 to be a prime number, it would have been required that 263 263 has only two divisors, i.e., itself and 1.
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263 263 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 263 263 is about 513.092.
Thus, the square root of 263 263 is not an integer, and therefore 263 263 is not a square number.
The square of a number (here 263 263) is the result of the product of this number (263 263) by itself (i.e., 263 263 × 263 263); the square of 263 263 is sometimes called "raising 263 263 to the power 2", or "263 263 squared".
The square of 263 263 is 69 307 407 169 because 263 263 × 263 263 = 263 2632 = 69 307 407 169.
As a consequence, 263 263 is the square root of 69 307 407 169.
The multiples of 263 263 are all integers evenly divisible by 263 263, that is all numbers such that the remainder of the division by 263 263 is zero. There are infinitely many multiples of 263 263. The smallest multiples of 263 263 are: