It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 138 663 473 is not a prime number.
For example, 138 663 473 can be divided by 13: 138 663 473 / 13 = 10 666 421.
For 138 663 473 to be a prime number, it would have been required that 138 663 473 has only two divisors, i.e., itself and 1.
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138 663 473 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 138 663 473 is about 11 775.546.
Thus, the square root of 138 663 473 is not an integer, and therefore 138 663 473 is not a square number.
The square of a number (here 138 663 473) is the result of the product of this number (138 663 473) by itself (i.e., 138 663 473 × 138 663 473); the square of 138 663 473 is sometimes called "raising 138 663 473 to the power 2", or "138 663 473 squared".
The square of 138 663 473 is 19 227 558 744 421 728 because 138 663 473 × 138 663 473 = 138 663 4732 = 19 227 558 744 421 728.
As a consequence, 138 663 473 is the square root of 19 227 558 744 421 728.
138 663 473 is a number with 9 digits.
The multiples of 138 663 473 are all integers evenly divisible by 138 663 473, that is all numbers such that the remainder of the division by 138 663 473 is zero. There are infinitely many multiples of 138 663 473. The smallest multiples of 138 663 473 are: