13508689 has 2 divisors, whose sum is σ = 13508690. Its totient is φ = 13508688.

The previous prime is 13508669. The next prime is 13508701. The reversal of 13508689 is 98680531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 2585664 = 3305^2 + 1608^2 .

It is an emirp because it is prime and its reverse (98680531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13508689 - 2¹¹ = 13506641 is a prime.

It is not a weakly prime, because it can be changed into another prime (13508669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6754344 + 6754345.

It is an arithmetic number, because the mean of its divisors is an integer number (6754345).

Almost surely, 2^13508689 is an apocalyptic number.

It is an amenable number.

13508689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13508689 is an equidigital number, since it uses as much as digits as its factorization.

13508689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 13508689 is about 3675.4168471073. The cubic root of 13508689 is about 238.1612317568.

The spelling of 13508689 in words is "thirteen million, five hundred eight thousand, six hundred eighty-nine".