163423504 has 20 divisors (see below), whose sum is σ = 316839964. Its totient is φ = 81658368.

The previous prime is 163423501. The next prime is 163423511. The reversal of 163423504 is 405324361.

It can be written as a sum of positive squares in 2 ways, for example, as 76038400 + 87385104 = 8720^2 + 9348^2 .

It is not an unprimeable number, because it can be changed into a prime (163423501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35884 + ... + 40180.

Almost surely, 2^163423504 is an apocalyptic number.

It is an amenable number.

163423504 is a deficient number, since it is larger than the sum of its proper divisors (153416460).

163423504 is a wasteful number, since it uses less digits than its factorization.

163423504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682 (or 6676 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 163423504 is about 12783.7202722838. The cubic root of 163423504 is about 546.7282388179.

Adding to 163423504 its reverse (405324361), we get a palindrome (568747865).

The spelling of 163423504 in words is "one hundred sixty-three million, four hundred twenty-three thousand, five hundred four".