13526809 has 2 divisors, whose sum is σ = 13526810. Its totient is φ = 13526808.

The previous prime is 13526797. The next prime is 13526813. The reversal of 13526809 is 90862531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 2471184 = 3325^2 + 1572^2 .

It is a cyclic number.

It is not a de Polignac number, because 13526809 - 2⁹ = 13526297 is a prime.

It is not a weakly prime, because it can be changed into another prime (13526839) 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, 6763404 + 6763405.

It is an arithmetic number, because the mean of its divisors is an integer number (6763405).

Almost surely, 2^13526809 is an apocalyptic number.

It is an amenable number.

13526809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13526809 is an equidigital number, since it uses as much as digits as its factorization.

13526809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 13526809 is about 3677.8810475599. The cubic root of 13526809 is about 238.2676707413.

The spelling of 13526809 in words is "thirteen million, five hundred twenty-six thousand, eight hundred nine".