It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 740 409 is not a prime number.
For example, 740 409 can be divided by 3: 740 409 / 3 = 246 803.
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For 740 409 to be a prime number, it would have been required that 740 409 has only two divisors, i.e., itself and 1.
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740 409 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 740 409 is about 860.470.
Thus, the square root of 740 409 is not an integer, and therefore 740 409 is not a square number.
The square of a number (here 740 409) is the result of the product of this number (740 409) by itself (i.e., 740 409 × 740 409); the square of 740 409 is sometimes called "raising 740 409 to the power 2", or "740 409 squared".
The square of 740 409 is 548 205 487 281 because 740 409 × 740 409 = 740 4092 = 548 205 487 281.
As a consequence, 740 409 is the square root of 548 205 487 281.
The multiples of 740 409 are all integers evenly divisible by 740 409, that is all numbers such that the remainder of the division by 740 409 is zero. There are infinitely many multiples of 740 409. The smallest multiples of 740 409 are: