850940039 has 4 divisors (see below), whose sum is σ = 887937456. Its totient is φ = 813942624.

The previous prime is 850940009. The next prime is 850940053. The reversal of 850940039 is 930049058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930049058 = 2 ⋅465024529.

It is a cyclic number.

It is not a de Polignac number, because 850940039 - 2¹⁶ = 850874503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 850939984 and 850940011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850940009) 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 in 3 ways as a sum of consecutive naturals, for example, 18498674 + ... + 18498719.

It is an arithmetic number, because the mean of its divisors is an integer number (221984364).

Almost surely, 2^850940039 is an apocalyptic number.

850940039 is a deficient number, since it is larger than the sum of its proper divisors (36997417).

850940039 is a wasteful number, since it uses less digits than its factorization.

850940039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36997416.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 850940039 is about 29170.8765552220. The cubic root of 850940039 is about 947.6173120969.

The spelling of 850940039 in words is "eight hundred fifty million, nine hundred forty thousand, thirty-nine".