856075117 has 2 divisors, whose sum is σ = 856075118. Its totient is φ = 856075116.

The previous prime is 856075093. The next prime is 856075141. The reversal of 856075117 is 711570658.

It is a balanced prime because it is at equal distance from previous prime (856075093) and next prime (856075141).

It can be written as a sum of positive squares in only one way, i.e., 744962436 + 111112681 = 27294^2 + 10541^2 .

It is a cyclic number.

It is not a de Polignac number, because 856075117 - 2²³ = 847686509 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856075117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856072117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428037558 + 428037559.

It is an arithmetic number, because the mean of its divisors is an integer number (428037559).

Almost surely, 2^856075117 is an apocalyptic number.

It is an amenable number.

856075117 is a deficient number, since it is larger than the sum of its proper divisors (1).

856075117 is an equidigital number, since it uses as much as digits as its factorization.

856075117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 856075117 is about 29258.7613715960. The cubic root of 856075117 is about 949.5196526390.

The spelling of 856075117 in words is "eight hundred fifty-six million, seventy-five thousand, one hundred seventeen".