839495947 has 4 divisors (see below), whose sum is σ = 849610440. Its totient is φ = 829381456.

The previous prime is 839495939. The next prime is 839495953. The reversal of 839495947 is 749594938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749594938 = 2 ⋅374797469.

It is a cyclic number.

It is not a de Polignac number, because 839495947 - 2³ = 839495939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 839495891 and 839495900.

It is not an unprimeable number, because it can be changed into a prime (839495927) 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, 5057122 + ... + 5057287.

It is an arithmetic number, because the mean of its divisors is an integer number (212402610).

Almost surely, 2^839495947 is an apocalyptic number.

839495947 is a deficient number, since it is larger than the sum of its proper divisors (10114493).

839495947 is a wasteful number, since it uses less digits than its factorization.

839495947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10114492.

The product of its digits is 9797760, while the sum is 58.

The square root of 839495947 is about 28974.0564471045. The cubic root of 839495947 is about 943.3500306977.

The spelling of 839495947 in words is "eight hundred thirty-nine million, four hundred ninety-five thousand, nine hundred forty-seven".