It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 7 489 409 is not a prime number.
For example, 7 489 409 can be divided by 797: 7 489 409 / 797 = 9 397.
For 7 489 409 to be a prime number, it would have been required that 7 489 409 has only two divisors, i.e., itself and 1.
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7 489 409 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 7 489 409 is about 2 736.678.
Thus, the square root of 7 489 409 is not an integer, and therefore 7 489 409 is not a square number.
The square of a number (here 7 489 409) is the result of the product of this number (7 489 409) by itself (i.e., 7 489 409 × 7 489 409); the square of 7 489 409 is sometimes called "raising 7 489 409 to the power 2", or "7 489 409 squared".
The square of 7 489 409 is 56 091 247 169 281 because 7 489 409 × 7 489 409 = 7 489 4092 = 56 091 247 169 281.
As a consequence, 7 489 409 is the square root of 56 091 247 169 281.
The multiples of 7 489 409 are all integers evenly divisible by 7 489 409, that is all numbers such that the remainder of the division by 7 489 409 is zero. There are infinitely many multiples of 7 489 409. The smallest multiples of 7 489 409 are: