It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 427 997 513 is not a prime number.
For example, 427 997 513 can be divided by 9 521: 427 997 513 / 9521 = 44 953.
For 427 997 513 to be a prime number, it would have been required that 427 997 513 has only two divisors, i.e., itself and 1.
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427 997 513 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 427 997 513 is about 20 688.101.
Thus, the square root of 427 997 513 is not an integer, and therefore 427 997 513 is not a square number.
The square of a number (here 427 997 513) is the result of the product of this number (427 997 513) by itself (i.e., 427 997 513 × 427 997 513); the square of 427 997 513 is sometimes called "raising 427 997 513 to the power 2", or "427 997 513 squared".
The square of 427 997 513 is 183 181 871 134 185 184 because 427 997 513 × 427 997 513 = 427 997 5132 = 183 181 871 134 185 184.
As a consequence, 427 997 513 is the square root of 183 181 871 134 185 184.
427 997 513 is a number with 9 digits.
The multiples of 427 997 513 are all integers evenly divisible by 427 997 513, that is all numbers such that the remainder of the division by 427 997 513 is zero. There are infinitely many multiples of 427 997 513. The smallest multiples of 427 997 513 are: