850039 has 4 divisors (see below), whose sum is σ = 859680. Its totient is φ = 840400.

The previous prime is 850033. The next prime is 850043. The reversal of 850039 is 930058.

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 850039 - 2¹¹ = 847991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 849995 and 850022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850033) 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, 4687 + ... + 4864.

It is an arithmetic number, because the mean of its divisors is an integer number (214920).

2⁸⁵⁰⁰³⁹ is an apocalyptic number.

850039 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

850039 is a deficient number, since it is larger than the sum of its proper divisors (9641).

850039 is an equidigital number, since it uses as much as digits as its factorization.

850039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9640.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 850039 is about 921.9755962063. The cubic root of 850039 is about 94.7282724596.

The spelling of 850039 in words is "eight hundred fifty thousand, thirty-nine".