389181689 has 16 divisors (see below), whose sum is σ = 441622272. Its totient is φ = 340262208.

The previous prime is 389181677. The next prime is 389181707. The reversal of 389181689 is 986181983.

It is a de Polignac number, because none of the positive numbers 2^k-389181689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389181689.

It is not an unprimeable number, because it can be changed into a prime (389181619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24479 + ... + 37115.

It is an arithmetic number, because the mean of its divisors is an integer number (27601392).

Almost surely, 2^389181689 is an apocalyptic number.

It is an amenable number.

389181689 is a deficient number, since it is larger than the sum of its proper divisors (52440583).

389181689 is a wasteful number, since it uses less digits than its factorization.

389181689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12776.

The product of its digits is 746496, while the sum is 53.

The square root of 389181689 is about 19727.6883846030. The cubic root of 389181689 is about 730.1029997906.

The spelling of 389181689 in words is "three hundred eighty-nine million, one hundred eighty-one thousand, six hundred eighty-nine".