389792989 has 8 divisors (see below), whose sum is σ = 399215520. Its totient is φ = 380468400.

The previous prime is 389792981. The next prime is 389792993. The reversal of 389792989 is 989297983.

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

It is a cyclic number.

It is not a de Polignac number, because 389792989 - 2³ = 389792981 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 389792989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389792981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16399 + ... + 32380.

It is an arithmetic number, because the mean of its divisors is an integer number (49901940).

Almost surely, 2^389792989 is an apocalyptic number.

It is an amenable number.

389792989 is a deficient number, since it is larger than the sum of its proper divisors (9422531).

389792989 is a wasteful number, since it uses less digits than its factorization.

389792989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48971.

The product of its digits is 17635968, while the sum is 64.

The square root of 389792989 is about 19743.1757577144. The cubic root of 389792989 is about 730.4850651184.

The spelling of 389792989 in words is "three hundred eighty-nine million, seven hundred ninety-two thousand, nine hundred eighty-nine".