847474839 has 8 divisors (see below), whose sum is σ = 1255518320. Its totient is φ = 564983208.

The previous prime is 847474829. The next prime is 847474861. The reversal of 847474839 is 938474748.

It is not a de Polignac number, because 847474839 - 2⁷ = 847474711 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 (847474829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15693952 + ... + 15694005.

It is an arithmetic number, because the mean of its divisors is an integer number (156939790).

Almost surely, 2^847474839 is an apocalyptic number.

847474839 is a deficient number, since it is larger than the sum of its proper divisors (408043481).

847474839 is a wasteful number, since it uses less digits than its factorization.

847474839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31387966 (or 31387960 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The square root of 847474839 is about 29111.4211092485. The cubic root of 847474839 is about 946.3292656443.

Subtracting 847474839 from its reverse (938474748), we obtain a palindrome (90999909).

The spelling of 847474839 in words is "eight hundred forty-seven million, four hundred seventy-four thousand, eight hundred thirty-nine".