13117691 has 2 divisors, whose sum is σ = 13117692. Its totient is φ = 13117690.

The previous prime is 13117679. The next prime is 13117697. The reversal of 13117691 is 19671131.

13117691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13117691 - 2¹⁴ = 13101307 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13117697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6558845 + 6558846.

It is an arithmetic number, because the mean of its divisors is an integer number (6558846).

Almost surely, 2^13117691 is an apocalyptic number.

13117691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13117691 is an equidigital number, since it uses as much as digits as its factorization.

13117691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 29.

The square root of 13117691 is about 3621.8353082381. The cubic root of 13117691 is about 235.8409046946.

The spelling of 13117691 in words is "thirteen million, one hundred seventeen thousand, six hundred ninety-one".