839439713947 has 4 divisors (see below), whose sum is σ = 842121630280. Its totient is φ = 836757797616.

The previous prime is 839439713927. The next prime is 839439713999. The reversal of 839439713947 is 749317934938.

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 839439713947 - 2³⁹ = 289683900059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (839439713927) 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, 1340957697 + ... + 1340958322.

It is an arithmetic number, because the mean of its divisors is an integer number (210530407570).

Almost surely, 2^839439713947 is an apocalyptic number.

839439713947 is a deficient number, since it is larger than the sum of its proper divisors (2681916333).

839439713947 is a wasteful number, since it uses less digits than its factorization.

839439713947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681916332.

The product of its digits is 123451776, while the sum is 67.

The spelling of 839439713947 in words is "eight hundred thirty-nine billion, four hundred thirty-nine million, seven hundred thirteen thousand, nine hundred forty-seven".