163906085 has 16 divisors (see below), whose sum is σ = 228473472. Its totient is φ = 110548800.

The previous prime is 163906081. The next prime is 163906087. The reversal of 163906085 is 580609361.

It is not a de Polignac number, because 163906085 - 2² = 163906081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163906081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36251 + ... + 40520.

It is an arithmetic number, because the mean of its divisors is an integer number (14279592).

Almost surely, 2^163906085 is an apocalyptic number.

It is an amenable number.

163906085 is a deficient number, since it is larger than the sum of its proper divisors (64567387).

163906085 is an equidigital number, since it uses as much as digits as its factorization.

163906085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76844.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 163906085 is about 12802.5811850580. The cubic root of 163906085 is about 547.2658632038.

The spelling of 163906085 in words is "one hundred sixty-three million, nine hundred six thousand, eighty-five".