850965409 has 24 divisors (see below), whose sum is σ = 1014311808. Its totient is φ = 711516960.

The previous prime is 850965397. The next prime is 850965419. The reversal of 850965409 is 904569058.

850965409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 850965409 - 2⁷ = 850965281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (850965419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1245582 + ... + 1246264.

It is an arithmetic number, because the mean of its divisors is an integer number (42262992).

Almost surely, 2^850965409 is an apocalyptic number.

It is an amenable number.

850965409 is a deficient number, since it is larger than the sum of its proper divisors (163346399).

850965409 is a wasteful number, since it uses less digits than its factorization.

850965409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 850965409 is about 29171.3114035005. The cubic root of 850965409 is about 947.6267294515.

The spelling of 850965409 in words is "eight hundred fifty million, nine hundred sixty-five thousand, four hundred nine".