889091863 has 4 divisors (see below), whose sum is σ = 969918408. Its totient is φ = 808265320.

The previous prime is 889091851. The next prime is 889091867. The reversal of 889091863 is 368190988.

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 889091863 - 2⁹ = 889091351 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 889091863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889091867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40413256 + ... + 40413277.

It is an arithmetic number, because the mean of its divisors is an integer number (242479602).

Almost surely, 2^889091863 is an apocalyptic number.

889091863 is a deficient number, since it is larger than the sum of its proper divisors (80826545).

889091863 is a wasteful number, since it uses less digits than its factorization.

889091863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80826544.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 889091863 is about 29817.6434850241. The cubic root of 889091863 is about 961.5728927996.

The spelling of 889091863 in words is "eight hundred eighty-nine million, ninety-one thousand, eight hundred sixty-three".