823393 has 4 divisors (see below), whose sum is σ = 840960. Its totient is φ = 805828.

The previous prime is 823373. The next prime is 823399. The reversal of 823393 is 393328.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 823393 - 2⁹ = 822881 is a prime.

It is a Duffinian number.

823393 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (823399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8713 + ... + 8806.

It is an arithmetic number, because the mean of its divisors is an integer number (210240).

2⁸²³³⁹³ is an apocalyptic number.

It is an amenable number.

823393 is a deficient number, since it is larger than the sum of its proper divisors (17567).

823393 is a wasteful number, since it uses less digits than its factorization.

823393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17566.

The product of its digits is 3888, while the sum is 28.

The square root of 823393 is about 907.4100506386. The cubic root of 823393 is about 93.7279367339.

The spelling of 823393 in words is "eight hundred twenty-three thousand, three hundred ninety-three".