850139 has 2 divisors, whose sum is σ = 850140. Its totient is φ = 850138.

The previous prime is 850133. The next prime is 850147. The reversal of 850139 is 931058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 850139 - 2⁸ = 849883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (850133) 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 as a sum of consecutive naturals, namely, 425069 + 425070.

It is an arithmetic number, because the mean of its divisors is an integer number (425070).

2⁸⁵⁰¹³⁹ is an apocalyptic number.

850139 is a deficient number, since it is larger than the sum of its proper divisors (1).

850139 is an equidigital number, since it uses as much as digits as its factorization.

850139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 850139 is about 922.0298259818. The cubic root of 850139 is about 94.7319869777.

It can be divided in two parts, 850 and 139, that added together give a palindrome (989).

The spelling of 850139 in words is "eight hundred fifty thousand, one hundred thirty-nine".