823387 has 4 divisors (see below), whose sum is σ = 835056. Its totient is φ = 811720.

The previous prime is 823373. The next prime is 823399. The reversal of 823387 is 783328.

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 823387 - 2¹⁹ = 299099 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 not an unprimeable number, because it can be changed into a prime (823337) 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, 5728 + ... + 5869.

It is an arithmetic number, because the mean of its divisors is an integer number (208764).

2⁸²³³⁸⁷ is an apocalyptic number.

823387 is a deficient number, since it is larger than the sum of its proper divisors (11669).

823387 is a wasteful number, since it uses less digits than its factorization.

823387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11668.

The product of its digits is 8064, while the sum is 31.

The square root of 823387 is about 907.4067445198. The cubic root of 823387 is about 93.7277090707.

The spelling of 823387 in words is "eight hundred twenty-three thousand, three hundred eighty-seven".