850820039 has 2 divisors, whose sum is σ = 850820040. Its totient is φ = 850820038.

The previous prime is 850820027. The next prime is 850820099. The reversal of 850820039 is 930028058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 850820039 - 2²⁰ = 849771463 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 850819990 and 850820008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (850820099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425410019 + 425410020.

It is an arithmetic number, because the mean of its divisors is an integer number (425410020).

Almost surely, 2^850820039 is an apocalyptic number.

850820039 is a deficient number, since it is larger than the sum of its proper divisors (1).

850820039 is an equidigital number, since it uses as much as digits as its factorization.

850820039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 850820039 is about 29168.8196367285. The cubic root of 850820039 is about 947.5727655100.

The spelling of 850820039 in words is "eight hundred fifty million, eight hundred twenty thousand, thirty-nine".