11717791 has 2 divisors, whose sum is σ = 11717792. Its totient is φ = 11717790.

The previous prime is 11717779. The next prime is 11717837. The reversal of 11717791 is 19771711.

11717791 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11717791 - 2⁷ = 11717663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11717191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5858895 + 5858896.

It is an arithmetic number, because the mean of its divisors is an integer number (5858896).

Almost surely, 2^11717791 is an apocalyptic number.

11717791 is a deficient number, since it is larger than the sum of its proper divisors (1).

11717791 is an equidigital number, since it uses as much as digits as its factorization.

11717791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3087, while the sum is 34.

The square root of 11717791 is about 3423.1259106261. The cubic root of 11717791 is about 227.1338779576.

The spelling of 11717791 in words is "eleven million, seven hundred seventeen thousand, seven hundred ninety-one".