823087 has 4 divisors (see below), whose sum is σ = 829696. Its totient is φ = 816480.

The previous prime is 823051. The next prime is 823117. The reversal of 823087 is 780328.

It is a happy number.

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 823087 - 2¹¹ = 821039 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 (823787) 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, 3114 + ... + 3367.

It is an arithmetic number, because the mean of its divisors is an integer number (207424).

2⁸²³⁰⁸⁷ is an apocalyptic number.

823087 is a deficient number, since it is larger than the sum of its proper divisors (6609).

823087 is a wasteful number, since it uses less digits than its factorization.

823087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 823087 is about 907.2414232166. The cubic root of 823087 is about 93.7163244976.

The spelling of 823087 in words is "eight hundred twenty-three thousand, eighty-seven".