13403637809 has 2 divisors, whose sum is σ = 13403637810. Its totient is φ = 13403637808.

The previous prime is 13403637781. The next prime is 13403637827. The reversal of 13403637809 is 90873630431.

13403637809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8638773025 + 4764864784 = 92945^2 + 69028^2 .

It is a cyclic number.

It is not a de Polignac number, because 13403637809 - 2⁸ = 13403637553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13403637809.

It is not a weakly prime, because it can be changed into another prime (13403637829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6701818904 + 6701818905.

It is an arithmetic number, because the mean of its divisors is an integer number (6701818905).

Almost surely, 2^13403637809 is an apocalyptic number.

It is an amenable number.

13403637809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13403637809 is an equidigital number, since it uses as much as digits as its factorization.

13403637809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 13403637809 in words is "thirteen billion, four hundred three million, six hundred thirty-seven thousand, eight hundred nine".