11539913 has 16 divisors (see below), whose sum is σ = 14591616. Its totient is φ = 8864640.

The previous prime is 11539909. The next prime is 11539937. The reversal of 11539913 is 31993511.

It is a happy number.

11539913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11539913 - 2² = 11539909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11539913.

It is not an unprimeable number, because it can be changed into a prime (11539903) 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, 4595 + ... + 6647.

It is an arithmetic number, because the mean of its divisors is an integer number (911976).

Almost surely, 2^11539913 is an apocalyptic number.

It is an amenable number.

11539913 is a deficient number, since it is larger than the sum of its proper divisors (3051703).

11539913 is a wasteful number, since it uses less digits than its factorization.

11539913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144.

The product of its digits is 3645, while the sum is 32.

The square root of 11539913 is about 3397.0447450689. The cubic root of 11539913 is about 225.9787029296.

The spelling of 11539913 in words is "eleven million, five hundred thirty-nine thousand, nine hundred thirteen".