13008409 has 4 divisors (see below), whose sum is σ = 13574016. Its totient is φ = 12442804.

The previous prime is 13008367. The next prime is 13008419. The reversal of 13008409 is 90480031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90480031 = 3529 ⋅25639.

It is a cyclic number.

It is not a de Polignac number, because 13008409 - 2¹¹ = 13006361 is a prime.

It is a super-2 number, since 2×13008409² = 338437409422562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13008419) 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 in 3 ways as a sum of consecutive naturals, for example, 282769 + ... + 282814.

It is an arithmetic number, because the mean of its divisors is an integer number (3393504).

Almost surely, 2^13008409 is an apocalyptic number.

It is an amenable number.

13008409 is a deficient number, since it is larger than the sum of its proper divisors (565607).

13008409 is an equidigital number, since it uses as much as digits as its factorization.

13008409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565606.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 13008409 is about 3606.7172054377. The cubic root of 13008409 is about 235.1841562380.

The spelling of 13008409 in words is "thirteen million, eight thousand, four hundred nine".