13695509 has 2 divisors, whose sum is σ = 13695510. Its totient is φ = 13695508.

The previous prime is 13695497. The next prime is 13695533. The reversal of 13695509 is 90559631.

13695509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9060100 + 4635409 = 3010^2 + 2153^2 .

It is a cyclic number.

It is not a de Polignac number, because 13695509 - 2¹² = 13691413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13695559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6847754 + 6847755.

It is an arithmetic number, because the mean of its divisors is an integer number (6847755).

Almost surely, 2^13695509 is an apocalyptic number.

It is an amenable number.

13695509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13695509 is an equidigital number, since it uses as much as digits as its factorization.

13695509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 13695509 is about 3700.7443845799. The cubic root of 13695509 is about 239.2541020433.

The spelling of 13695509 in words is "thirteen million, six hundred ninety-five thousand, five hundred nine".