It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 825 991 742 is not a prime number.
For example, 825 991 742 can be divided by 2: 825 991 742 / 2 = 412 995 871.
For 825 991 742 to be a prime number, it would have been required that 825 991 742 has only two divisors, i.e., itself and 1.
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825 991 742 is an even number, because it is evenly divisible by 2: 825 991 742 / 2 = 412 995 871.
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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 825 991 742 is about 28 740.072.
Thus, the square root of 825 991 742 is not an integer, and therefore 825 991 742 is not a square number.
The square of a number (here 825 991 742) is the result of the product of this number (825 991 742) by itself (i.e., 825 991 742 × 825 991 742); the square of 825 991 742 is sometimes called "raising 825 991 742 to the power 2", or "825 991 742 squared".
The square of 825 991 742 is 682 262 357 852 194 560 because 825 991 742 × 825 991 742 = 825 991 7422 = 682 262 357 852 194 560.
As a consequence, 825 991 742 is the square root of 682 262 357 852 194 560.
825 991 742 is a number with 9 digits.
The multiples of 825 991 742 are all integers evenly divisible by 825 991 742, that is all numbers such that the remainder of the division by 825 991 742 is zero. There are infinitely many multiples of 825 991 742. The smallest multiples of 825 991 742 are: