13478825909 has 2 divisors, whose sum is σ = 13478825910. Its totient is φ = 13478825908.

The previous prime is 13478825903. The next prime is 13478825911. The reversal of 13478825909 is 90952887431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13394590225 + 84235684 = 115735^2 + 9178^2 .

It is a cyclic number.

It is not a de Polignac number, because 13478825909 - 2⁸ = 13478825653 is a prime.

Together with 13478825911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13478825903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6739412954 + 6739412955.

It is an arithmetic number, because the mean of its divisors is an integer number (6739412955).

Almost surely, 2^13478825909 is an apocalyptic number.

It is an amenable number.

13478825909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13478825909 is an equidigital number, since it uses as much as digits as its factorization.

13478825909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 13478825909 in words is "thirteen billion, four hundred seventy-eight million, eight hundred twenty-five thousand, nine hundred nine".