13691771 has 2 divisors, whose sum is σ = 13691772. Its totient is φ = 13691770.

The previous prime is 13691767. The next prime is 13691773. The reversal of 13691771 is 17719631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13691771 - 2² = 13691767 is a prime.

Together with 13691773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13691773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6845885 + 6845886.

It is an arithmetic number, because the mean of its divisors is an integer number (6845886).

Almost surely, 2^13691771 is an apocalyptic number.

13691771 is a deficient number, since it is larger than the sum of its proper divisors (1).

13691771 is an equidigital number, since it uses as much as digits as its factorization.

13691771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938, while the sum is 35.

The square root of 13691771 is about 3700.2393165848. The cubic root of 13691771 is about 239.2323330286.

The spelling of 13691771 in words is "thirteen million, six hundred ninety-one thousand, seven hundred seventy-one".