389016685921 has 8 divisors (see below), whose sum is σ = 392289715584. Its totient is φ = 385756619520.

The previous prime is 389016685831. The next prime is 389016685933. The reversal of 389016685921 is 129586610983.

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 389016685921 - 2⁷ = 389016685793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389016685951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3180541 + ... + 3300586.

It is an arithmetic number, because the mean of its divisors is an integer number (49036214448).

Almost surely, 2^389016685921 is an apocalyptic number.

It is an amenable number.

389016685921 is a deficient number, since it is larger than the sum of its proper divisors (3273029663).

389016685921 is a wasteful number, since it uses less digits than its factorization.

389016685921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6481631.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 389016685921 in words is "three hundred eighty-nine billion, sixteen million, six hundred eighty-five thousand, nine hundred twenty-one".