850813 has 4 divisors (see below), whose sum is σ = 853468. Its totient is φ = 848160.

The previous prime is 850807. The next prime is 850823. The reversal of 850813 is 318058.

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

It can be written as a sum of positive squares in 2 ways, for example, as 487204 + 363609 = 698^2 + 603^2 .

It is a cyclic number.

It is not a de Polignac number, because 850813 - 2⁵ = 850781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (213367).

2⁸⁵⁰⁸¹³ is an apocalyptic number.

It is an amenable number.

850813 is a deficient number, since it is larger than the sum of its proper divisors (2655).

850813 is a wasteful number, since it uses less digits than its factorization.

850813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 850813 is about 922.3952515056. The cubic root of 850813 is about 94.7570152351.

The spelling of 850813 in words is "eight hundred fifty thousand, eight hundred thirteen".