163889 has 8 divisors (see below), whose sum is σ = 183168. Its totient is φ = 145360.

The previous prime is 163883. The next prime is 163901. The reversal of 163889 is 988361.

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 163889 - 2⁸ = 163633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359 + ... + 675.

It is an arithmetic number, because the mean of its divisors is an integer number (22896).

2¹⁶³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

163889 is a deficient number, since it is larger than the sum of its proper divisors (19279).

163889 is a wasteful number, since it uses less digits than its factorization.

163889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375.

The product of its digits is 10368, while the sum is 35.

The square root of 163889 is about 404.8320639475. The cubic root of 163889 is about 54.7246847513.

The spelling of 163889 in words is "one hundred sixty-three thousand, eight hundred eighty-nine".