It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 494 738 is not a prime number.
For example, 494 738 can be divided by 2: 494 738 / 2 = 247 369.
For 494 738 to be a prime number, it would have been required that 494 738 has only two divisors, i.e., itself and 1.
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494 738 is an even number, because it is evenly divisible by 2: 494 738 / 2 = 247 369.
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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 494 738 is about 703.376.
Thus, the square root of 494 738 is not an integer, and therefore 494 738 is not a square number.
The square of a number (here 494 738) is the result of the product of this number (494 738) by itself (i.e., 494 738 × 494 738); the square of 494 738 is sometimes called "raising 494 738 to the power 2", or "494 738 squared".
The square of 494 738 is 244 765 688 644 because 494 738 × 494 738 = 494 7382 = 244 765 688 644.
As a consequence, 494 738 is the square root of 244 765 688 644.
The multiples of 494 738 are all integers evenly divisible by 494 738, that is all numbers such that the remainder of the division by 494 738 is zero. There are infinitely many multiples of 494 738. The smallest multiples of 494 738 are: