856022317 has 2 divisors, whose sum is σ = 856022318. Its totient is φ = 856022316.

The previous prime is 856022287. The next prime is 856022359. The reversal of 856022317 is 713220658.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 457061641 + 398960676 = 21379^2 + 19974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856022317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856022617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428011158 + 428011159.

It is an arithmetic number, because the mean of its divisors is an integer number (428011159).

Almost surely, 2^856022317 is an apocalyptic number.

It is an amenable number.

856022317 is a deficient number, since it is larger than the sum of its proper divisors (1).

856022317 is an equidigital number, since it uses as much as digits as its factorization.

856022317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 856022317 is about 29257.8590638481. The cubic root of 856022317 is about 949.5001311167.

The spelling of 856022317 in words is "eight hundred fifty-six million, twenty-two thousand, three hundred seventeen".