It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 609 is not a prime number.
For example, 490 609 can be divided by 7: 490 609 / 7 = 70 087.
For 490 609 to be a prime number, it would have been required that 490 609 has only two divisors, i.e., itself and 1.
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490 609 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 490 609 is about 700.435.
Thus, the square root of 490 609 is not an integer, and therefore 490 609 is not a square number.
The square of a number (here 490 609) is the result of the product of this number (490 609) by itself (i.e., 490 609 × 490 609); the square of 490 609 is sometimes called "raising 490 609 to the power 2", or "490 609 squared".
The square of 490 609 is 240 697 190 881 because 490 609 × 490 609 = 490 6092 = 240 697 190 881.
As a consequence, 490 609 is the square root of 240 697 190 881.
The multiples of 490 609 are all integers evenly divisible by 490 609, that is all numbers such that the remainder of the division by 490 609 is zero. There are infinitely many multiples of 490 609. The smallest multiples of 490 609 are: