163918057 has 4 divisors (see below), whose sum is σ = 163968256. Its totient is φ = 163867860.

The previous prime is 163918031. The next prime is 163918081. The reversal of 163918057 is 750819361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163918057 - 2²⁷ = 29700329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163918087) 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, 19833 + ... + 26854.

It is an arithmetic number, because the mean of its divisors is an integer number (40992064).

Almost surely, 2^163918057 is an apocalyptic number.

It is an amenable number.

163918057 is a deficient number, since it is larger than the sum of its proper divisors (50199).

163918057 is an equidigital number, since it uses as much as digits as its factorization.

163918057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50198.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 163918057 is about 12803.0487384841. The cubic root of 163918057 is about 547.2791873123.

The spelling of 163918057 in words is "one hundred sixty-three million, nine hundred eighteen thousand, fifty-seven".