163817923 has 2 divisors, whose sum is σ = 163817924. Its totient is φ = 163817922.

The previous prime is 163817921. The next prime is 163817947. The reversal of 163817923 is 329718361.

163817923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163817923 - 2¹ = 163817921 is a prime.

Together with 163817921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (163817921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81908961 + 81908962.

It is an arithmetic number, because the mean of its divisors is an integer number (81908962).

Almost surely, 2^163817923 is an apocalyptic number.

163817923 is a deficient number, since it is larger than the sum of its proper divisors (1).

163817923 is an equidigital number, since it uses as much as digits as its factorization.

163817923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 163817923 is about 12799.1375881346. The cubic root of 163817923 is about 547.1677242681.

The spelling of 163817923 in words is "one hundred sixty-three million, eight hundred seventeen thousand, nine hundred twenty-three".