11823439 has 4 divisors (see below), whose sum is σ = 11845224. Its totient is φ = 11801656.

The previous prime is 11823421. The next prime is 11823443. The reversal of 11823439 is 93432811.

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 11823439 - 2⁵ = 11823407 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 a self number, because there is not a number n which added to its sum of digits gives 11823439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11823419) 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 3 ways as a sum of consecutive naturals, for example, 10057 + ... + 11170.

It is an arithmetic number, because the mean of its divisors is an integer number (2961306).

Almost surely, 2^11823439 is an apocalyptic number.

11823439 is a deficient number, since it is larger than the sum of its proper divisors (21785).

11823439 is an equidigital number, since it uses as much as digits as its factorization.

11823439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21784.

The product of its digits is 5184, while the sum is 31.

The square root of 11823439 is about 3438.5227932937. The cubic root of 11823439 is about 227.8144522524.

The spelling of 11823439 in words is "eleven million, eight hundred twenty-three thousand, four hundred thirty-nine".