It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 978 674 is not a prime number.
For example, 42 978 674 can be divided by 2: 42 978 674 / 2 = 21 489 337.
For 42 978 674 to be a prime number, it would have been required that 42 978 674 has only two divisors, i.e., itself and 1.
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42 978 674 is an even number, because it is evenly divisible by 2: 42 978 674 / 2 = 21 489 337.
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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 42 978 674 is about 6 555.812.
Thus, the square root of 42 978 674 is not an integer, and therefore 42 978 674 is not a square number.
The square of a number (here 42 978 674) is the result of the product of this number (42 978 674) by itself (i.e., 42 978 674 × 42 978 674); the square of 42 978 674 is sometimes called "raising 42 978 674 to the power 2", or "42 978 674 squared".
The square of 42 978 674 is 1 847 166 418 798 276 because 42 978 674 × 42 978 674 = 42 978 6742 = 1 847 166 418 798 276.
As a consequence, 42 978 674 is the square root of 1 847 166 418 798 276.
42 978 674 is a number with 8 digits.
The multiples of 42 978 674 are all integers evenly divisible by 42 978 674, that is all numbers such that the remainder of the division by 42 978 674 is zero. There are infinitely many multiples of 42 978 674. The smallest multiples of 42 978 674 are: