It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 164 138 is not a prime number.
For example, 164 138 can be divided by 2: 164 138 / 2 = 82 069.
For 164 138 to be a prime number, it would have been required that 164 138 has only two divisors, i.e., itself and 1.
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164 138 is an even number, because it is evenly divisible by 2: 164 138 / 2 = 82 069.
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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 164 138 is about 405.139.
Thus, the square root of 164 138 is not an integer, and therefore 164 138 is not a square number.
The square of a number (here 164 138) is the result of the product of this number (164 138) by itself (i.e., 164 138 × 164 138); the square of 164 138 is sometimes called "raising 164 138 to the power 2", or "164 138 squared".
The square of 164 138 is 26 941 283 044 because 164 138 × 164 138 = 164 1382 = 26 941 283 044.
As a consequence, 164 138 is the square root of 26 941 283 044.
The multiples of 164 138 are all integers evenly divisible by 164 138, that is all numbers such that the remainder of the division by 164 138 is zero. There are infinitely many multiples of 164 138. The smallest multiples of 164 138 are: