163965091 has 8 divisors (see below), whose sum is σ = 171224064. Its totient is φ = 156717000.

The previous prime is 163965077. The next prime is 163965157. The reversal of 163965091 is 190569361.

163965091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163965091 - 2⁵ = 163965059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163965491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50190 + ... + 53356.

It is an arithmetic number, because the mean of its divisors is an integer number (21403008).

Almost surely, 2^163965091 is an apocalyptic number.

163965091 is a deficient number, since it is larger than the sum of its proper divisors (7258973).

163965091 is a wasteful number, since it uses less digits than its factorization.

163965091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 163965091 is about 12804.8854348643. The cubic root of 163965091 is about 547.3315270162.

The spelling of 163965091 in words is "one hundred sixty-three million, nine hundred sixty-five thousand, ninety-one".