850009643 has 16 divisors (see below), whose sum is σ = 1014675456. Its totient is φ = 696215520.

The previous prime is 850009609. The next prime is 850009649. The reversal of 850009643 is 346900058.

850009643 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 850009643 - 2⁶ = 850009579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (850009649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220430 + ... + 224252.

It is an arithmetic number, because the mean of its divisors is an integer number (63417216).

Almost surely, 2^850009643 is an apocalyptic number.

850009643 is a deficient number, since it is larger than the sum of its proper divisors (164665813).

850009643 is a wasteful number, since it uses less digits than its factorization.

850009643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 850009643 is about 29154.9248498431. The cubic root of 850009643 is about 947.2718193322.

The spelling of 850009643 in words is "eight hundred fifty million, nine thousand, six hundred forty-three".