11855939 has 4 divisors (see below), whose sum is σ = 11863560. Its totient is φ = 11848320.

The previous prime is 11855933. The next prime is 11855959. The reversal of 11855939 is 93955811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11855939 - 2¹⁶ = 11790403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11855896 and 11855905.

It is not an unprimeable number, because it can be changed into a prime (11855933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542 + ... + 4899.

It is an arithmetic number, because the mean of its divisors is an integer number (2965890).

Almost surely, 2^11855939 is an apocalyptic number.

11855939 is a deficient number, since it is larger than the sum of its proper divisors (7621).

11855939 is an equidigital number, since it uses as much as digits as its factorization.

11855939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620.

The product of its digits is 48600, while the sum is 41.

The square root of 11855939 is about 3443.2454167544. The cubic root of 11855939 is about 228.0229983470.

The spelling of 11855939 in words is "eleven million, eight hundred fifty-five thousand, nine hundred thirty-nine".