11855903 has 2 divisors, whose sum is σ = 11855904. Its totient is φ = 11855902.

The previous prime is 11855881. The next prime is 11855911. The reversal of 11855903 is 30955811.

11855903 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (30955811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11855903 - 2⁶ = 11855839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11855903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11855933) 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 as a sum of consecutive naturals, namely, 5927951 + 5927952.

It is an arithmetic number, because the mean of its divisors is an integer number (5927952).

Almost surely, 2^11855903 is an apocalyptic number.

11855903 is a deficient number, since it is larger than the sum of its proper divisors (1).

11855903 is an equidigital number, since it uses as much as digits as its factorization.

11855903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 11855903 is about 3443.2401891242. The cubic root of 11855903 is about 228.0227675530.

The spelling of 11855903 in words is "eleven million, eight hundred fifty-five thousand, nine hundred three".