850842517 has 6 divisors (see below), whose sum is σ = 989755638. Its totient is φ = 729293544.

The previous prime is 850842497. The next prime is 850842527. The reversal of 850842517 is 715248058.

It can be written as a sum of positive squares in only one way, i.e., 744525796 + 106316721 = 27286^2 + 10311^2 .

It is not a de Polignac number, because 850842517 - 2⁷ = 850842389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 850842517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850842527) 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 in 5 ways as a sum of consecutive naturals, for example, 8682018 + ... + 8682115.

It is an arithmetic number, because the mean of its divisors is an integer number (164959273).

Almost surely, 2^850842517 is an apocalyptic number.

It is an amenable number.

850842517 is a deficient number, since it is larger than the sum of its proper divisors (138913121).

850842517 is a wasteful number, since it uses less digits than its factorization.

850842517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17364147 (or 17364140 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 850842517 is about 29169.2049428845. The cubic root of 850842517 is about 947.5811101469.

The spelling of 850842517 in words is "eight hundred fifty million, eight hundred forty-two thousand, five hundred seventeen".