13693817 has 2 divisors, whose sum is σ = 13693818. Its totient is φ = 13693816.

The previous prime is 13693777. The next prime is 13693819. The reversal of 13693817 is 71839631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13169641 + 524176 = 3629^2 + 724^2 .

It is an emirp because it is prime and its reverse (71839631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13693817 - 2¹² = 13689721 is a prime.

Together with 13693819, 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 (13693819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6846908 + 6846909.

It is an arithmetic number, because the mean of its divisors is an integer number (6846909).

Almost surely, 2^13693817 is an apocalyptic number.

It is an amenable number.

13693817 is a deficient number, since it is larger than the sum of its proper divisors (1).

13693817 is an equidigital number, since it uses as much as digits as its factorization.

13693817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 13693817 is about 3700.5157748617. The cubic root of 13693817 is about 239.2442488227.

The spelling of 13693817 in words is "thirteen million, six hundred ninety-three thousand, eight hundred seventeen".