856806127 has 2 divisors, whose sum is σ = 856806128. Its totient is φ = 856806126.

The previous prime is 856806101. The next prime is 856806161. The reversal of 856806127 is 721608658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856806127 - 2²³ = 848417519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856803127) 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, 428403063 + 428403064.

It is an arithmetic number, because the mean of its divisors is an integer number (428403064).

Almost surely, 2^856806127 is an apocalyptic number.

856806127 is a deficient number, since it is larger than the sum of its proper divisors (1).

856806127 is an equidigital number, since it uses as much as digits as its factorization.

856806127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 856806127 is about 29271.2508615536. The cubic root of 856806127 is about 949.7898434485.

The spelling of 856806127 in words is "eight hundred fifty-six million, eight hundred six thousand, one hundred twenty-seven".