11391613 has 4 divisors (see below), whose sum is σ = 11400480. Its totient is φ = 11382748.

The previous prime is 11391607. The next prime is 11391617. The reversal of 11391613 is 31619311.

It is a happy number.

11391613 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11391613 - 2⁹ = 11391101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391617) 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, 2095 + ... + 5212.

It is an arithmetic number, because the mean of its divisors is an integer number (2850120).

Almost surely, 2^11391613 is an apocalyptic number.

It is an amenable number.

11391613 is a deficient number, since it is larger than the sum of its proper divisors (8867).

11391613 is an equidigital number, since it uses as much as digits as its factorization.

11391613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8866.

The product of its digits is 486, while the sum is 25.

The square root of 11391613 is about 3375.1463671965. The cubic root of 11391613 is about 225.0065051617.

The spelling of 11391613 in words is "eleven million, three hundred ninety-one thousand, six hundred thirteen".