It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 83 721 998 is not a prime number.
For example, 83 721 998 can be divided by 2: 83 721 998 / 2 = 41 860 999.
For 83 721 998 to be a prime number, it would have been required that 83 721 998 has only two divisors, i.e., itself and 1.
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83 721 998 is an even number, because it is evenly divisible by 2: 83 721 998 / 2 = 41 860 999.
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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 83 721 998 is about 9 149.973.
Thus, the square root of 83 721 998 is not an integer, and therefore 83 721 998 is not a square number.
The square of a number (here 83 721 998) is the result of the product of this number (83 721 998) by itself (i.e., 83 721 998 × 83 721 998); the square of 83 721 998 is sometimes called "raising 83 721 998 to the power 2", or "83 721 998 squared".
The square of 83 721 998 is 7 009 372 949 112 004 because 83 721 998 × 83 721 998 = 83 721 9982 = 7 009 372 949 112 004.
As a consequence, 83 721 998 is the square root of 7 009 372 949 112 004.
83 721 998 is a number with 8 digits.
The multiples of 83 721 998 are all integers evenly divisible by 83 721 998, that is all numbers such that the remainder of the division by 83 721 998 is zero. There are infinitely many multiples of 83 721 998. The smallest multiples of 83 721 998 are: