163890663 has 16 divisors (see below), whose sum is σ = 229122816. Its totient is φ = 104005440.

The previous prime is 163890647. The next prime is 163890691. The reversal of 163890663 is 366098361.

It is not a de Polignac number, because 163890663 - 2⁴ = 163890647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163890163) 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, 8931 + ... + 20187.

It is an arithmetic number, because the mean of its divisors is an integer number (14320176).

Almost surely, 2^163890663 is an apocalyptic number.

163890663 is a deficient number, since it is larger than the sum of its proper divisors (65232153).

163890663 is a wasteful number, since it uses less digits than its factorization.

163890663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11494.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 163890663 is about 12801.9788704715. The cubic root of 163890663 is about 547.2486984986.

The spelling of 163890663 in words is "one hundred sixty-three million, eight hundred ninety thousand, six hundred sixty-three".