389388983 has 4 divisors (see below), whose sum is σ = 409883160. Its totient is φ = 368894808.

The previous prime is 389388977. The next prime is 389389043. The reversal of 389388983 is 389883983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389388983 - 2¹² = 389384887 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 (389388913) 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, 10247060 + ... + 10247097.

It is an arithmetic number, because the mean of its divisors is an integer number (102470790).

Almost surely, 2^389388983 is an apocalyptic number.

389388983 is a deficient number, since it is larger than the sum of its proper divisors (20494177).

389388983 is a wasteful number, since it uses less digits than its factorization.

389388983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20494176.

The product of its digits is 8957952, while the sum is 59.

The square root of 389388983 is about 19732.9415698724. The cubic root of 389388983 is about 730.2326043022.

The spelling of 389388983 in words is "three hundred eighty-nine million, three hundred eighty-eight thousand, nine hundred eighty-three".