164642123 has 2 divisors, whose sum is σ = 164642124. Its totient is φ = 164642122.

The previous prime is 164642117. The next prime is 164642129. The reversal of 164642123 is 321246461.

164642123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (164642117) and next prime (164642129).

It is an emirp because it is prime and its reverse (321246461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164642123 - 2²⁶ = 97533259 is a prime.

It is not a weakly prime, because it can be changed into another prime (164642129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82321061 + 82321062.

It is an arithmetic number, because the mean of its divisors is an integer number (82321062).

Almost surely, 2^164642123 is an apocalyptic number.

164642123 is a deficient number, since it is larger than the sum of its proper divisors (1).

164642123 is an equidigital number, since it uses as much as digits as its factorization.

164642123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 164642123 is about 12831.2946735706. The cubic root of 164642123 is about 548.0838255540.

Adding to 164642123 its reverse (321246461), we get a palindrome (485888584).

The spelling of 164642123 in words is "one hundred sixty-four million, six hundred forty-two thousand, one hundred twenty-three".