13688789 has 2 divisors, whose sum is σ = 13688790. Its totient is φ = 13688788.

The previous prime is 13688771. The next prime is 13688809. The reversal of 13688789 is 98788631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8702500 + 4986289 = 2950^2 + 2233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13688789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13688989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6844394 + 6844395.

It is an arithmetic number, because the mean of its divisors is an integer number (6844395).

Almost surely, 2^13688789 is an apocalyptic number.

It is an amenable number.

13688789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13688789 is an equidigital number, since it uses as much as digits as its factorization.

13688789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 13688789 is about 3699.8363477322. The cubic root of 13688789 is about 239.2149638946.

The spelling of 13688789 in words is "thirteen million, six hundred eighty-eight thousand, seven hundred eighty-nine".