13081409 has 4 divisors (see below), whose sum is σ = 14270640. Its totient is φ = 11892180.

The previous prime is 13081379. The next prime is 13081423. The reversal of 13081409 is 90418031.

13081409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13081409 - 2⁸ = 13081153 is a prime.

It is a super-2 number, since 2×13081409² = 342246522850562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13081909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594599 + ... + 594620.

It is an arithmetic number, because the mean of its divisors is an integer number (3567660).

Almost surely, 2^13081409 is an apocalyptic number.

It is an amenable number.

13081409 is a deficient number, since it is larger than the sum of its proper divisors (1189231).

13081409 is a wasteful number, since it uses less digits than its factorization.

13081409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189230.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 13081409 is about 3616.8230534545. The cubic root of 13081409 is about 235.6232677933.

The spelling of 13081409 in words is "thirteen million, eighty-one thousand, four hundred nine".