856888663 has 2 divisors, whose sum is σ = 856888664. Its totient is φ = 856888662.

The previous prime is 856888651. The next prime is 856888687. The reversal of 856888663 is 366888658.

856888663 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 is a cyclic number.

It is not a de Polignac number, because 856888663 - 2¹³ = 856880471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856888598 and 856888607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856888603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428444331 + 428444332.

It is an arithmetic number, because the mean of its divisors is an integer number (428444332).

Almost surely, 2^856888663 is an apocalyptic number.

856888663 is a deficient number, since it is larger than the sum of its proper divisors (1).

856888663 is an equidigital number, since it uses as much as digits as its factorization.

856888663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13271040, while the sum is 58.

The square root of 856888663 is about 29272.6606751078. The cubic root of 856888663 is about 949.8203401716.

The spelling of 856888663 in words is "eight hundred fifty-six million, eight hundred eighty-eight thousand, six hundred sixty-three".