It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 421 342 068 is not a prime number.
For example, 421 342 068 can be divided by 2: 421 342 068 / 2 = 210 671 034.
For 421 342 068 to be a prime number, it would have been required that 421 342 068 has only two divisors, i.e., itself and 1.
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421 342 068 is an even number, because it is evenly divisible by 2: 421 342 068 / 2 = 210 671 034.
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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 421 342 068 is about 20 526.619.
Thus, the square root of 421 342 068 is not an integer, and therefore 421 342 068 is not a square number.
The square of a number (here 421 342 068) is the result of the product of this number (421 342 068) by itself (i.e., 421 342 068 × 421 342 068); the square of 421 342 068 is sometimes called "raising 421 342 068 to the power 2", or "421 342 068 squared".
The square of 421 342 068 is 177 529 138 266 516 608 because 421 342 068 × 421 342 068 = 421 342 0682 = 177 529 138 266 516 608.
As a consequence, 421 342 068 is the square root of 177 529 138 266 516 608.
421 342 068 is a number with 9 digits.
The multiples of 421 342 068 are all integers evenly divisible by 421 342 068, that is all numbers such that the remainder of the division by 421 342 068 is zero. There are infinitely many multiples of 421 342 068. The smallest multiples of 421 342 068 are: