389475863138 has 4 divisors (see below), whose sum is σ = 584213794710. Its totient is φ = 194737931568.

The previous prime is 389475863087. The next prime is 389475863239. The reversal of 389475863138 is 831368574983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831368574983 = 137 ⋅6068383759.

It can be written as a sum of positive squares in only one way, i.e., 337278693049 + 52197170089 = 580757^2 + 228467^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97368965783 + ... + 97368965786.

Almost surely, 2^389475863138 is an apocalyptic number.

389475863138 is a deficient number, since it is larger than the sum of its proper divisors (194737931572).

389475863138 is a wasteful number, since it uses less digits than its factorization.

389475863138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194737931571.

The product of its digits is 104509440, while the sum is 65.

The spelling of 389475863138 in words is "three hundred eighty-nine billion, four hundred seventy-five million, eight hundred sixty-three thousand, one hundred thirty-eight".