823085 has 4 divisors (see below), whose sum is σ = 987708. Its totient is φ = 658464.

The previous prime is 823051. The next prime is 823117. The reversal of 823085 is 580328.

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 405769 + 417316 = 637^2 + 646^2 .

It is a cyclic number.

It is not a de Polignac number, because 823085 - 2¹⁸ = 560941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 7.

It is a zygodrome in base 3.

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, 82304 + ... + 82313.

It is an arithmetic number, because the mean of its divisors is an integer number (246927).

2⁸²³⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

823085 is a deficient number, since it is larger than the sum of its proper divisors (164623).

823085 is a wasteful number, since it uses less digits than its factorization.

823085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164622.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 823085 is about 907.2403209734. The cubic root of 823085 is about 93.7162485912.

The spelling of 823085 in words is "eight hundred twenty-three thousand, eighty-five".