855792517 has 2 divisors, whose sum is σ = 855792518. Its totient is φ = 855792516.

The previous prime is 855792503. The next prime is 855792551. The reversal of 855792517 is 715297558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805083876 + 50708641 = 28374^2 + 7121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855792517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855792017) 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, 427896258 + 427896259.

It is an arithmetic number, because the mean of its divisors is an integer number (427896259).

Almost surely, 2^855792517 is an apocalyptic number.

It is an amenable number.

855792517 is a deficient number, since it is larger than the sum of its proper divisors (1).

855792517 is an equidigital number, since it uses as much as digits as its factorization.

855792517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 49.

The square root of 855792517 is about 29253.9316502928. The cubic root of 855792517 is about 949.4151587768.

The spelling of 855792517 in words is "eight hundred fifty-five million, seven hundred ninety-two thousand, five hundred seventeen".