13386509 has 2 divisors, whose sum is σ = 13386510. Its totient is φ = 13386508.

The previous prime is 13386481. The next prime is 13386539. The reversal of 13386509 is 90568331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13322500 + 64009 = 3650^2 + 253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13386509 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 (13386539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6693254 + 6693255.

It is an arithmetic number, because the mean of its divisors is an integer number (6693255).

Almost surely, 2^13386509 is an apocalyptic number.

It is an amenable number.

13386509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13386509 is an equidigital number, since it uses as much as digits as its factorization.

13386509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 13386509 is about 3658.7578493254. The cubic root of 13386509 is about 237.4410357777.

The spelling of 13386509 in words is "thirteen million, three hundred eighty-six thousand, five hundred nine".