163885 has 8 divisors (see below), whose sum is σ = 199800. Its totient is φ = 129024.

The previous prime is 163883. The next prime is 163901. The reversal of 163885 is 588361.

It can be written as a sum of positive squares in 4 ways, for example, as 26244 + 137641 = 162^2 + 371^2 .

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

It is a 6-Lehmer number, since φ(163885) divides (163885-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 163885 - 2¹ = 163883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163883) 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, 141 + ... + 589.

It is an arithmetic number, because the mean of its divisors is an integer number (24975).

2¹⁶³⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

163885 is a deficient number, since it is larger than the sum of its proper divisors (35915).

163885 is an equidigital number, since it uses as much as digits as its factorization.

163885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527.

The product of its digits is 5760, while the sum is 31.

The square root of 163885 is about 404.8271235972. The cubic root of 163885 is about 54.7242395302.

The spelling of 163885 in words is "one hundred sixty-three thousand, eight hundred eighty-five".