850384639 has 4 divisors (see below), whose sum is σ = 915798856. Its totient is φ = 784970424.

The previous prime is 850384631. The next prime is 850384643. The reversal of 850384639 is 936483058.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 850384639 - 2³ = 850384631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850384631) 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, 32707089 + ... + 32707114.

It is an arithmetic number, because the mean of its divisors is an integer number (228949714).

Almost surely, 2^850384639 is an apocalyptic number.

850384639 is a deficient number, since it is larger than the sum of its proper divisors (65414217).

850384639 is a wasteful number, since it uses less digits than its factorization.

850384639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65414216.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 850384639 is about 29161.3552325676. The cubic root of 850384639 is about 947.4111004652.

The spelling of 850384639 in words is "eight hundred fifty million, three hundred eighty-four thousand, six hundred thirty-nine".