11915913 has 8 divisors (see below), whose sum is σ = 15904800. Its totient is φ = 7935488.

The previous prime is 11915903. The next prime is 11915927. The reversal of 11915913 is 31951911.

11915913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11915913 - 2⁵ = 11915881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11915903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2818 + ... + 5636.

It is an arithmetic number, because the mean of its divisors is an integer number (1988100).

Almost surely, 2^11915913 is an apocalyptic number.

It is an amenable number.

11915913 is a deficient number, since it is larger than the sum of its proper divisors (3988887).

11915913 is a wasteful number, since it uses less digits than its factorization.

11915913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231.

The product of its digits is 1215, while the sum is 30.

The square root of 11915913 is about 3451.9433657000. The cubic root of 11915913 is about 228.4068413171.

The spelling of 11915913 in words is "eleven million, nine hundred fifteen thousand, nine hundred thirteen".