163984865 has 8 divisors (see below), whose sum is σ = 214671168. Its totient is φ = 119261680.

The previous prime is 163984859. The next prime is 163984889. The reversal of 163984865 is 568489361.

163984865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 163984865 - 2⁸ = 163984609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490717 + ... + 1490826.

It is an arithmetic number, because the mean of its divisors is an integer number (26833896).

Almost surely, 2^163984865 is an apocalyptic number.

It is an amenable number.

163984865 is a deficient number, since it is larger than the sum of its proper divisors (50686303).

163984865 is a wasteful number, since it uses less digits than its factorization.

163984865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981559.

The product of its digits is 1244160, while the sum is 50.

The square root of 163984865 is about 12805.6575387600. The cubic root of 163984865 is about 547.3535286478.

The spelling of 163984865 in words is "one hundred sixty-three million, nine hundred eighty-four thousand, eight hundred sixty-five".