163439887 has 16 divisors (see below), whose sum is σ = 186846912. Its totient is φ = 141626880.

The previous prime is 163439869. The next prime is 163439929. The reversal of 163439887 is 788934361.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 163439887 - 2¹⁵ = 163407119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163439887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163439687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118878 + ... + 120244.

It is an arithmetic number, because the mean of its divisors is an integer number (11677932).

Almost surely, 2^163439887 is an apocalyptic number.

163439887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

163439887 is a deficient number, since it is larger than the sum of its proper divisors (23407025).

163439887 is a wasteful number, since it uses less digits than its factorization.

163439887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938.

The product of its digits is 870912, while the sum is 49.

The square root of 163439887 is about 12784.3610321361. The cubic root of 163439887 is about 546.7465078128.

The spelling of 163439887 in words is "one hundred sixty-three million, four hundred thirty-nine thousand, eight hundred eighty-seven".