873805 has 4 divisors (see below), whose sum is σ = 1048572. Its totient is φ = 699040.

The previous prime is 873787. The next prime is 873863. The reversal of 873805 is 508378.

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 137641 + 736164 = 371^2 + 858^2 .

It is not a de Polignac number, because 873805 - 2⁵ = 873773 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87376 + ... + 87385.

It is an arithmetic number, because the mean of its divisors is an integer number (262143).

2⁸⁷³⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

873805 is a deficient number, since it is larger than the sum of its proper divisors (174767).

873805 is a wasteful number, since it uses less digits than its factorization.

873805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174766.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 873805 is about 934.7753740873. The cubic root of 873805 is about 95.6029973442.

The spelling of 873805 in words is "eight hundred seventy-three thousand, eight hundred five".