389673891 has 6 divisors (see below), whose sum is σ = 562862300. Its totient is φ = 259782588.

The previous prime is 389673883. The next prime is 389673913. The reversal of 389673891 is 198376983.

It is not a de Polignac number, because 389673891 - 2³ = 389673883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389673821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21648541 + ... + 21648558.

Almost surely, 2^389673891 is an apocalyptic number.

389673891 is a deficient number, since it is larger than the sum of its proper divisors (173188409).

389673891 is a wasteful number, since it uses less digits than its factorization.

389673891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43297105 (or 43297102 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 389673891 is about 19740.1593458614. The cubic root of 389673891 is about 730.4106596648.

The spelling of 389673891 in words is "three hundred eighty-nine million, six hundred seventy-three thousand, eight hundred ninety-one".