856318829 has 2 divisors, whose sum is σ = 856318830. Its totient is φ = 856318828.

The previous prime is 856318811. The next prime is 856318871. The reversal of 856318829 is 928813658.

856318829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452710729 + 403608100 = 21277^2 + 20090^2 .

It is a cyclic number.

It is not a de Polignac number, because 856318829 - 2²⁴ = 839541613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856318889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428159414 + 428159415.

It is an arithmetic number, because the mean of its divisors is an integer number (428159415).

Almost surely, 2^856318829 is an apocalyptic number.

It is an amenable number.

856318829 is a deficient number, since it is larger than the sum of its proper divisors (1).

856318829 is an equidigital number, since it uses as much as digits as its factorization.

856318829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 50.

The square root of 856318829 is about 29262.9258448297. The cubic root of 856318829 is about 949.6097488517.

The spelling of 856318829 in words is "eight hundred fifty-six million, three hundred eighteen thousand, eight hundred twenty-nine".