856926869 has 2 divisors, whose sum is σ = 856926870. Its totient is φ = 856926868.

The previous prime is 856926859. The next prime is 856926883. The reversal of 856926869 is 968629658.

856926869 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., 436266769 + 420660100 = 20887^2 + 20510^2 .

It is a cyclic number.

It is not a de Polignac number, because 856926869 - 2⁴ = 856926853 is a prime.

It is a super-2 number, since 2×856926869² = 1468647317628286322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856926839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428463434 + 428463435.

It is an arithmetic number, because the mean of its divisors is an integer number (428463435).

Almost surely, 2^856926869 is an apocalyptic number.

It is an amenable number.

856926869 is a deficient number, since it is larger than the sum of its proper divisors (1).

856926869 is an equidigital number, since it uses as much as digits as its factorization.

856926869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 59.

The square root of 856926869 is about 29273.3132562749. The cubic root of 856926869 is about 949.8344564732.

The spelling of 856926869 in words is "eight hundred fifty-six million, nine hundred twenty-six thousand, eight hundred sixty-nine".