856663883 has 2 divisors, whose sum is σ = 856663884. Its totient is φ = 856663882.

The previous prime is 856663867. The next prime is 856663897. The reversal of 856663883 is 388366658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856663883 - 2⁴ = 856663867 is a prime.

It is not a weakly prime, because it can be changed into another prime (856603883) 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, 428331941 + 428331942.

It is an arithmetic number, because the mean of its divisors is an integer number (428331942).

Almost surely, 2^856663883 is an apocalyptic number.

856663883 is a deficient number, since it is larger than the sum of its proper divisors (1).

856663883 is an equidigital number, since it uses as much as digits as its factorization.

856663883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 53.

The square root of 856663883 is about 29268.8210046117. The cubic root of 856663883 is about 949.7372802609.

The spelling of 856663883 in words is "eight hundred fifty-six million, six hundred sixty-three thousand, eight hundred eighty-three".