856919113 has 2 divisors, whose sum is σ = 856919114. Its totient is φ = 856919112.

The previous prime is 856919101. The next prime is 856919117. The reversal of 856919113 is 311919658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 790284544 + 66634569 = 28112^2 + 8163^2 .

It is a cyclic number.

It is not a de Polignac number, because 856919113 - 2¹³ = 856910921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856919113.

It is not a weakly prime, because it can be changed into another prime (856919117) 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, 428459556 + 428459557.

It is an arithmetic number, because the mean of its divisors is an integer number (428459557).

Almost surely, 2^856919113 is an apocalyptic number.

It is an amenable number.

856919113 is a deficient number, since it is larger than the sum of its proper divisors (1).

856919113 is an equidigital number, since it uses as much as digits as its factorization.

856919113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 43.

The square root of 856919113 is about 29273.1807803662. The cubic root of 856919113 is about 949.8315908307.

The spelling of 856919113 in words is "eight hundred fifty-six million, nine hundred nineteen thousand, one hundred thirteen".