It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 40 742 689 is not a prime number.
For example, 40 742 689 can be divided by 13: 40 742 689 / 13 = 3 134 053.
For 40 742 689 to be a prime number, it would have been required that 40 742 689 has only two divisors, i.e., itself and 1.
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40 742 689 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 40 742 689 is 6 383.
Therefore, the square root of 40 742 689 is an integer, and as a consequence 40 742 689 is a perfect square.
As a consequence, 6 383 is the square root of 40 742 689.
The square of a number (here 40 742 689) is the result of the product of this number (40 742 689) by itself (i.e., 40 742 689 × 40 742 689); the square of 40 742 689 is sometimes called "raising 40 742 689 to the power 2", or "40 742 689 squared".
The square of 40 742 689 is 1 659 966 706 950 721 because 40 742 689 × 40 742 689 = 40 742 6892 = 1 659 966 706 950 721.
As a consequence, 40 742 689 is the square root of 1 659 966 706 950 721.
40 742 689 is a number with 8 digits.
The multiples of 40 742 689 are all integers evenly divisible by 40 742 689, that is all numbers such that the remainder of the division by 40 742 689 is zero. There are infinitely many multiples of 40 742 689. The smallest multiples of 40 742 689 are: