856789411 has 2 divisors, whose sum is σ = 856789412. Its totient is φ = 856789410.

The previous prime is 856789379. The next prime is 856789441. The reversal of 856789411 is 114987658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856789411 - 2⁵ = 856789379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (856789441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428394705 + 428394706.

It is an arithmetic number, because the mean of its divisors is an integer number (428394706).

Almost surely, 2^856789411 is an apocalyptic number.

856789411 is a deficient number, since it is larger than the sum of its proper divisors (1).

856789411 is an equidigital number, since it uses as much as digits as its factorization.

856789411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 49.

The square root of 856789411 is about 29270.9653240203. The cubic root of 856789411 is about 949.7836667146.

The spelling of 856789411 in words is "eight hundred fifty-six million, seven hundred eighty-nine thousand, four hundred eleven".