13081909 has 2 divisors, whose sum is σ = 13081910. Its totient is φ = 13081908.

The previous prime is 13081903. The next prime is 13081919. The reversal of 13081909 is 90918031.

13081909 is digitally balanced in base 3, 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., 7273809 + 5808100 = 2697^2 + 2410^2 .

It is an emirp because it is prime and its reverse (90918031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13081909 - 2¹³ = 13073717 is a prime.

It is a super-2 number, since 2×13081909² = 342272686168562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13081903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6540954 + 6540955.

It is an arithmetic number, because the mean of its divisors is an integer number (6540955).

Almost surely, 2^13081909 is an apocalyptic number.

It is an amenable number.

13081909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13081909 is an equidigital number, since it uses as much as digits as its factorization.

13081909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 13081909 is about 3616.8921742291. The cubic root of 13081909 is about 235.6262697669.

The spelling of 13081909 in words is "thirteen million, eighty-one thousand, nine hundred nine".