11823839 has 4 divisors (see below), whose sum is σ = 12098856. Its totient is φ = 11548824.

The previous prime is 11823829. The next prime is 11823841. The reversal of 11823839 is 93832811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11823839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11823799 and 11823808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11823809) 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, 137444 + ... + 137529.

It is an arithmetic number, because the mean of its divisors is an integer number (3024714).

Almost surely, 2^11823839 is an apocalyptic number.

11823839 is a deficient number, since it is larger than the sum of its proper divisors (275017).

11823839 is an equidigital number, since it uses as much as digits as its factorization.

11823839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275016.

The product of its digits is 10368, while the sum is 35.

The square root of 11823839 is about 3438.5809573136. The cubic root of 11823839 is about 227.8170212949.

The spelling of 11823839 in words is "eleven million, eight hundred twenty-three thousand, eight hundred thirty-nine".