11811903 has 16 divisors (see below), whose sum is σ = 17003520. Its totient is φ = 7271264.

The previous prime is 11811887. The next prime is 11811913. The reversal of 11811903 is 30911811.

It is a cyclic number.

It is not a de Polignac number, because 11811903 - 2⁴ = 11811887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951 + ... + 4952.

It is an arithmetic number, because the mean of its divisors is an integer number (1062720).

Almost surely, 2^11811903 is an apocalyptic number.

11811903 is a deficient number, since it is larger than the sum of its proper divisors (5191617).

11811903 is a wasteful number, since it uses less digits than its factorization.

11811903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5958.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 11811903 is about 3436.8449193992. The cubic root of 11811903 is about 227.7403361200.

It can be divided in two parts, 118 and 11903, that added together give a palindrome (12021).

The spelling of 11811903 in words is "eleven million, eight hundred eleven thousand, nine hundred three".