13489909 has 2 divisors, whose sum is σ = 13489910. Its totient is φ = 13489908.

The previous prime is 13489873. The next prime is 13489913. The reversal of 13489909 is 90998431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8427409 + 5062500 = 2903^2 + 2250^2 .

It is an emirp because it is prime and its reverse (90998431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13489909 - 2⁷ = 13489781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13489919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6744954 + 6744955.

It is an arithmetic number, because the mean of its divisors is an integer number (6744955).

Almost surely, 2^13489909 is an apocalyptic number.

It is an amenable number.

13489909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13489909 is an equidigital number, since it uses as much as digits as its factorization.

13489909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 13489909 is about 3672.8611463000. The cubic root of 13489909 is about 238.0508153625.

The spelling of 13489909 in words is "thirteen million, four hundred eighty-nine thousand, nine hundred nine".