13985617 has 2 divisors, whose sum is σ = 13985618. Its totient is φ = 13985616.

The previous prime is 13985603. The next prime is 13985639. The reversal of 13985617 is 71658931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11282881 + 2702736 = 3359^2 + 1644^2 .

It is an emirp because it is prime and its reverse (71658931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13985617 - 2¹¹ = 13983569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13985617.

It is not a weakly prime, because it can be changed into another prime (13985687) 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, 6992808 + 6992809.

It is an arithmetic number, because the mean of its divisors is an integer number (6992809).

Almost surely, 2^13985617 is an apocalyptic number.

It is an amenable number.

13985617 is a deficient number, since it is larger than the sum of its proper divisors (1).

13985617 is an equidigital number, since it uses as much as digits as its factorization.

13985617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 13985617 is about 3739.7348836515. The cubic root of 13985617 is about 240.9316622411.

The spelling of 13985617 in words is "thirteen million, nine hundred eighty-five thousand, six hundred seventeen".