389311889 has 4 divisors (see below), whose sum is σ = 389520960. Its totient is φ = 389102820.

The previous prime is 389311841. The next prime is 389311927. The reversal of 389311889 is 988113983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389311889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389311829) 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, 101717 + ... + 105474.

It is an arithmetic number, because the mean of its divisors is an integer number (97380240).

Almost surely, 2^389311889 is an apocalyptic number.

It is an amenable number.

389311889 is a deficient number, since it is larger than the sum of its proper divisors (209071).

389311889 is a wasteful number, since it uses less digits than its factorization.

389311889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209070.

The product of its digits is 373248, while the sum is 50.

The square root of 389311889 is about 19730.9880391226. The cubic root of 389311889 is about 730.1844089067.

The spelling of 389311889 in words is "three hundred eighty-nine million, three hundred eleven thousand, eight hundred eighty-nine".