873685 has 4 divisors (see below), whose sum is σ = 1048428. Its totient is φ = 698944.

The previous prime is 873671. The next prime is 873689. The reversal of 873685 is 586378.

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 625681 + 248004 = 791^2 + 498^2 .

It is a cyclic number.

It is not a de Polignac number, because 873685 - 2¹³ = 865493 is a prime.

It is a Duffinian number.

873685 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873689) by changing a digit.

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, 87364 + ... + 87373.

It is an arithmetic number, because the mean of its divisors is an integer number (262107).

2⁸⁷³⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

873685 is a deficient number, since it is larger than the sum of its proper divisors (174743).

873685 is a wasteful number, since it uses less digits than its factorization.

873685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174742.

The product of its digits is 40320, while the sum is 37.

The square root of 873685 is about 934.7111853402. The cubic root of 873685 is about 95.5986207442.

The spelling of 873685 in words is "eight hundred seventy-three thousand, six hundred eighty-five".