It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 800 000 013 is not a prime number.
For example, 800 000 013 can be divided by 3: 800 000 013 / 3 = 266 666 671.
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For 800 000 013 to be a prime number, it would have been required that 800 000 013 has only two divisors, i.e., itself and 1.
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800 000 013 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 800 000 013 is about 28 284.271.
Thus, the square root of 800 000 013 is not an integer, and therefore 800 000 013 is not a square number.
The square of a number (here 800 000 013) is the result of the product of this number (800 000 013) by itself (i.e., 800 000 013 × 800 000 013); the square of 800 000 013 is sometimes called "raising 800 000 013 to the power 2", or "800 000 013 squared".
The square of 800 000 013 is 640 000 020 800 000 128 because 800 000 013 × 800 000 013 = 800 000 0132 = 640 000 020 800 000 128.
As a consequence, 800 000 013 is the square root of 640 000 020 800 000 128.
800 000 013 is a number with 9 digits.
The multiples of 800 000 013 are all integers evenly divisible by 800 000 013, that is all numbers such that the remainder of the division by 800 000 013 is zero. There are infinitely many multiples of 800 000 013. The smallest multiples of 800 000 013 are: