850643 has 4 divisors (see below), whose sum is σ = 853248. Its totient is φ = 848040.

The previous prime is 850637. The next prime is 850673. The reversal of 850643 is 346058.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 850643 - 2⁸ = 850387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (850613) 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 in 3 ways as a sum of consecutive naturals, for example, 728 + ... + 1493.

It is an arithmetic number, because the mean of its divisors is an integer number (213312).

2⁸⁵⁰⁶⁴³ is an apocalyptic number.

850643 is a deficient number, since it is larger than the sum of its proper divisors (2605).

850643 is a wasteful number, since it uses less digits than its factorization.

850643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 850643 is about 922.3030955169. The cubic root of 850643 is about 94.7507037168.

The spelling of 850643 in words is "eight hundred fifty thousand, six hundred forty-three".