It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 209 667 is not a prime number.
For example, 402 209 667 can be divided by 3: 402 209 667 / 3 = 134 069 889.
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For 402 209 667 to be a prime number, it would have been required that 402 209 667 has only two divisors, i.e., itself and 1.
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402 209 667 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 402 209 667 is about 20 055.166.
Thus, the square root of 402 209 667 is not an integer, and therefore 402 209 667 is not a square number.
The square of a number (here 402 209 667) is the result of the product of this number (402 209 667) by itself (i.e., 402 209 667 × 402 209 667); the square of 402 209 667 is sometimes called "raising 402 209 667 to the power 2", or "402 209 667 squared".
The square of 402 209 667 is 161 772 616 228 250 880 because 402 209 667 × 402 209 667 = 402 209 6672 = 161 772 616 228 250 880.
As a consequence, 402 209 667 is the square root of 161 772 616 228 250 880.
402 209 667 is a number with 9 digits.
The multiples of 402 209 667 are all integers evenly divisible by 402 209 667, that is all numbers such that the remainder of the division by 402 209 667 is zero. There are infinitely many multiples of 402 209 667. The smallest multiples of 402 209 667 are: