850685647 has 4 divisors (see below), whose sum is σ = 972212176. Its totient is φ = 729159120.

The previous prime is 850685639. The next prime is 850685653. The reversal of 850685647 is 746586058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746586058 = 2 ⋅373293029.

It is a cyclic number.

It is not a de Polignac number, because 850685647 - 2³ = 850685639 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 850685647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850685617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60763254 + ... + 60763267.

It is an arithmetic number, because the mean of its divisors is an integer number (243053044).

Almost surely, 2^850685647 is an apocalyptic number.

850685647 is a deficient number, since it is larger than the sum of its proper divisors (121526529).

850685647 is a wasteful number, since it uses less digits than its factorization.

850685647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121526528.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The square root of 850685647 is about 29166.5158529434. The cubic root of 850685647 is about 947.5228713299.

The spelling of 850685647 in words is "eight hundred fifty million, six hundred eighty-five thousand, six hundred forty-seven".