856941727 has 2 divisors, whose sum is σ = 856941728. Its totient is φ = 856941726.

The previous prime is 856941721. The next prime is 856941749. The reversal of 856941727 is 727149658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856941727 - 2⁷ = 856941599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856941721) 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 as a sum of consecutive naturals, namely, 428470863 + 428470864.

It is an arithmetic number, because the mean of its divisors is an integer number (428470864).

Almost surely, 2^856941727 is an apocalyptic number.

856941727 is a deficient number, since it is larger than the sum of its proper divisors (1).

856941727 is an equidigital number, since it uses as much as digits as its factorization.

856941727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 49.

The square root of 856941727 is about 29273.5670358089. The cubic root of 856941727 is about 949.8399460738.

The spelling of 856941727 in words is "eight hundred fifty-six million, nine hundred forty-one thousand, seven hundred twenty-seven".