823239823 has 8 divisors (see below), whose sum is σ = 941120640. Its totient is φ = 705427800.

The previous prime is 823239811. The next prime is 823239881. The reversal of 823239823 is 328932328.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 823239823 - 2⁹ = 823239311 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 (823239883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11688 + ... + 42226.

It is an arithmetic number, because the mean of its divisors is an integer number (117640080).

Almost surely, 2^823239823 is an apocalyptic number.

823239823 is a deficient number, since it is larger than the sum of its proper divisors (117880817).

823239823 is a wasteful number, since it uses less digits than its factorization.

823239823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34397.

The product of its digits is 124416, while the sum is 40.

The square root of 823239823 is about 28692.1561232334. The cubic root of 823239823 is about 937.2212425858.

The spelling of 823239823 in words is "eight hundred twenty-three million, two hundred thirty-nine thousand, eight hundred twenty-three".