13406909 has 2 divisors, whose sum is σ = 13406910. Its totient is φ = 13406908.

The previous prime is 13406879. The next prime is 13406917. The reversal of 13406909 is 90960431.

13406909 is digitally balanced in base 3, 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., 13344409 + 62500 = 3653^2 + 250^2 .

It is an emirp because it is prime and its reverse (90960431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13406909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13406929) 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, 6703454 + 6703455.

It is an arithmetic number, because the mean of its divisors is an integer number (6703455).

Almost surely, 2^13406909 is an apocalyptic number.

It is an amenable number.

13406909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13406909 is an equidigital number, since it uses as much as digits as its factorization.

13406909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 13406909 is about 3661.5446194195. The cubic root of 13406909 is about 237.5615884596.

The spelling of 13406909 in words is "thirteen million, four hundred six thousand, nine hundred nine".