It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 401 802 009 is not a prime number.
For example, 401 802 009 can be divided by 3: 401 802 009 / 3 = 133 934 003.
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For 401 802 009 to be a prime number, it would have been required that 401 802 009 has only two divisors, i.e., itself and 1.
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401 802 009 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 401 802 009 is about 20 045.000.
Thus, the square root of 401 802 009 is not an integer, and therefore 401 802 009 is not a square number.
The square of a number (here 401 802 009) is the result of the product of this number (401 802 009) by itself (i.e., 401 802 009 × 401 802 009); the square of 401 802 009 is sometimes called "raising 401 802 009 to the power 2", or "401 802 009 squared".
The square of 401 802 009 is 161 444 854 436 436 096 because 401 802 009 × 401 802 009 = 401 802 0092 = 161 444 854 436 436 096.
As a consequence, 401 802 009 is the square root of 161 444 854 436 436 096.
401 802 009 is a number with 9 digits.
The multiples of 401 802 009 are all integers evenly divisible by 401 802 009, that is all numbers such that the remainder of the division by 401 802 009 is zero. There are infinitely many multiples of 401 802 009. The smallest multiples of 401 802 009 are: