11543903 has 4 divisors (see below), whose sum is σ = 13193040. Its totient is φ = 9894768.

The previous prime is 11543893. The next prime is 11543911. The reversal of 11543903 is 30934511.

11543903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11543903 - 2⁶ = 11543839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543933) 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, 824558 + ... + 824571.

It is an arithmetic number, because the mean of its divisors is an integer number (3298260).

Almost surely, 2^11543903 is an apocalyptic number.

11543903 is a deficient number, since it is larger than the sum of its proper divisors (1649137).

11543903 is an equidigital number, since it uses as much as digits as its factorization.

11543903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649136.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 11543903 is about 3397.6319694752. The cubic root of 11543903 is about 226.0047444641.

The spelling of 11543903 in words is "eleven million, five hundred forty-three thousand, nine hundred three".