389505983 has 4 divisors (see below), whose sum is σ = 389548728. Its totient is φ = 389463240.

The previous prime is 389505953. The next prime is 389506003.

389505983 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389505983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389505953) 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, 1616 + ... + 27957.

It is an arithmetic number, because the mean of its divisors is an integer number (97387182).

Almost surely, 2^389505983 is an apocalyptic number.

389505983 is a deficient number, since it is larger than the sum of its proper divisors (42745).

389505983 is a wasteful number, since it uses less digits than its factorization.

389505983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42744.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The square root of 389505983 is about 19735.9059330956. The cubic root of 389505983 is about 730.3057348244.

The spelling of 389505983 in words is "three hundred eighty-nine million, five hundred five thousand, nine hundred eighty-three".