163887 has 4 divisors (see below), whose sum is σ = 218520. Its totient is φ = 109256.

The previous prime is 163883. The next prime is 163901. The reversal of 163887 is 788361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163887 - 2² = 163883 is a prime.

It is a D-number.

163887 is a lucky number.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27312 + ... + 27317.

It is an arithmetic number, because the mean of its divisors is an integer number (54630).

2¹⁶³⁸⁸⁷ is an apocalyptic number.

163887 is a deficient number, since it is larger than the sum of its proper divisors (54633).

163887 is an equidigital number, since it uses as much as digits as its factorization.

163887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54632.

The product of its digits is 8064, while the sum is 33.

The square root of 163887 is about 404.8295937799. The cubic root of 163887 is about 54.7244621417.

The spelling of 163887 in words is "one hundred sixty-three thousand, eight hundred eighty-seven".