It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 84 009 009 is not a prime number.
For example, 84 009 009 can be divided by 3: 84 009 009 / 3 = 28 003 003.
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For 84 009 009 to be a prime number, it would have been required that 84 009 009 has only two divisors, i.e., itself and 1.
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84 009 009 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 84 009 009 is about 9 165.643.
Thus, the square root of 84 009 009 is not an integer, and therefore 84 009 009 is not a square number.
The square of a number (here 84 009 009) is the result of the product of this number (84 009 009) by itself (i.e., 84 009 009 × 84 009 009); the square of 84 009 009 is sometimes called "raising 84 009 009 to the power 2", or "84 009 009 squared".
The square of 84 009 009 is 7 057 513 593 162 081 because 84 009 009 × 84 009 009 = 84 009 0092 = 7 057 513 593 162 081.
As a consequence, 84 009 009 is the square root of 7 057 513 593 162 081.
84 009 009 is a number with 8 digits.
The multiples of 84 009 009 are all integers evenly divisible by 84 009 009, that is all numbers such that the remainder of the division by 84 009 009 is zero. There are infinitely many multiples of 84 009 009. The smallest multiples of 84 009 009 are: