It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 493 438 is not a prime number.
For example, 493 438 can be divided by 2: 493 438 / 2 = 246 719.
For 493 438 to be a prime number, it would have been required that 493 438 has only two divisors, i.e., itself and 1.
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493 438 is an even number, because it is evenly divisible by 2: 493 438 / 2 = 246 719.
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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 493 438 is about 702.451.
Thus, the square root of 493 438 is not an integer, and therefore 493 438 is not a square number.
The square of a number (here 493 438) is the result of the product of this number (493 438) by itself (i.e., 493 438 × 493 438); the square of 493 438 is sometimes called "raising 493 438 to the power 2", or "493 438 squared".
The square of 493 438 is 243 481 059 844 because 493 438 × 493 438 = 493 4382 = 243 481 059 844.
As a consequence, 493 438 is the square root of 243 481 059 844.
The multiples of 493 438 are all integers evenly divisible by 493 438, that is all numbers such that the remainder of the division by 493 438 is zero. There are infinitely many multiples of 493 438. The smallest multiples of 493 438 are: