13697791 has 2 divisors, whose sum is σ = 13697792. Its totient is φ = 13697790.

The previous prime is 13697777. The next prime is 13697833. The reversal of 13697791 is 19779631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13697791 - 2¹⁵ = 13665023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13697701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6848895 + 6848896.

It is an arithmetic number, because the mean of its divisors is an integer number (6848896).

Almost surely, 2^13697791 is an apocalyptic number.

13697791 is a deficient number, since it is larger than the sum of its proper divisors (1).

13697791 is an equidigital number, since it uses as much as digits as its factorization.

13697791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 13697791 is about 3701.0526880875. The cubic root of 13697791 is about 239.2673897943.

The spelling of 13697791 in words is "thirteen million, six hundred ninety-seven thousand, seven hundred ninety-one".