164643023 has 2 divisors, whose sum is σ = 164643024. Its totient is φ = 164643022.

The previous prime is 164643019. The next prime is 164643043. The reversal of 164643023 is 320346461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164643023 - 2² = 164643019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164643013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82321511 + 82321512.

It is an arithmetic number, because the mean of its divisors is an integer number (82321512).

Almost surely, 2^164643023 is an apocalyptic number.

164643023 is a deficient number, since it is larger than the sum of its proper divisors (1).

164643023 is an equidigital number, since it uses as much as digits as its factorization.

164643023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 164643023 is about 12831.3297440289. The cubic root of 164643023 is about 548.0848242343.

Adding to 164643023 its reverse (320346461), we get a palindrome (484989484).

The spelling of 164643023 in words is "one hundred sixty-four million, six hundred forty-three thousand, twenty-three".