920823 has 4 divisors (see below), whose sum is σ = 1227768. Its totient is φ = 613880.

The previous prime is 920807. The next prime is 920827. The reversal of 920823 is 328029.

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 920823 - 2⁴ = 920807 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 920793 and 920802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920827) 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, 153468 + ... + 153473.

It is an arithmetic number, because the mean of its divisors is an integer number (306942).

2⁹²⁰⁸²³ is an apocalyptic number.

920823 is a deficient number, since it is larger than the sum of its proper divisors (306945).

920823 is a wasteful number, since it uses less digits than its factorization.

920823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306944.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 920823 is about 959.5952271661. The cubic root of 920823 is about 97.2878754494.

The spelling of 920823 in words is "nine hundred twenty thousand, eight hundred twenty-three".