839316861 has 6 divisors (see below), whose sum is σ = 1212346590. Its totient is φ = 559544568.

The previous prime is 839316857. The next prime is 839316883. The reversal of 839316861 is 168613938.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 590781636 + 248535225 = 24306^2 + 15765^2 .

It is not a de Polignac number, because 839316861 - 2² = 839316857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839366861) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 46628706 + ... + 46628723.

It is an arithmetic number, because the mean of its divisors is an integer number (202057765).

Almost surely, 2^839316861 is an apocalyptic number.

It is an amenable number.

839316861 is a deficient number, since it is larger than the sum of its proper divisors (373029729).

839316861 is a wasteful number, since it uses less digits than its factorization.

839316861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93257435 (or 93257432 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 839316861 is about 28970.9658278767. The cubic root of 839316861 is about 943.2829456813.

The spelling of 839316861 in words is "eight hundred thirty-nine million, three hundred sixteen thousand, eight hundred sixty-one".