839135649 has 16 divisors (see below), whose sum is σ = 1221511104. Its totient is φ = 508171200.

The previous prime is 839135639. The next prime is 839135653. The reversal of 839135649 is 946531938.

It is not a de Polignac number, because 839135649 - 2⁹ = 839135137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 839135598 and 839135607.

It is not an unprimeable number, because it can be changed into a prime (839135639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36367 + ... + 54779.

It is an arithmetic number, because the mean of its divisors is an integer number (76344444).

Almost surely, 2^839135649 is an apocalyptic number.

It is an amenable number.

839135649 is a deficient number, since it is larger than the sum of its proper divisors (382375455).

839135649 is a wasteful number, since it uses less digits than its factorization.

839135649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19808.

The product of its digits is 699840, while the sum is 48.

The square root of 839135649 is about 28967.8381830609. The cubic root of 839135649 is about 943.2150545585.

The spelling of 839135649 in words is "eight hundred thirty-nine million, one hundred thirty-five thousand, six hundred forty-nine".