850919009 has 4 divisors (see below), whose sum is σ = 895704240. Its totient is φ = 806133780.

The previous prime is 850918997. The next prime is 850919059. The reversal of 850919009 is 900919058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 850919009 - 2⁴ = 850918993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (850919059) 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 in 3 ways as a sum of consecutive naturals, for example, 22392587 + ... + 22392624.

It is an arithmetic number, because the mean of its divisors is an integer number (223926060).

Almost surely, 2^850919009 is an apocalyptic number.

It is an amenable number.

850919009 is a deficient number, since it is larger than the sum of its proper divisors (44785231).

850919009 is a wasteful number, since it uses less digits than its factorization.

850919009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44785230.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 850919009 is about 29170.5160907379. The cubic root of 850919009 is about 947.6095056102.

The spelling of 850919009 in words is "eight hundred fifty million, nine hundred nineteen thousand, nine".