13133409 has 16 divisors (see below), whose sum is σ = 18112320. Its totient is φ = 8458560.

The previous prime is 13133383. The next prime is 13133411. The reversal of 13133409 is 90433131.

It is not a de Polignac number, because 13133409 - 2⁵ = 13133377 is a prime.

It is a super-2 number, since 2×13133409² = 344972863922562, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13133479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19539 + ... + 20199.

It is an arithmetic number, because the mean of its divisors is an integer number (1132020).

Almost surely, 2^13133409 is an apocalyptic number.

It is an amenable number.

13133409 is a deficient number, since it is larger than the sum of its proper divisors (4978911).

13133409 is a wasteful number, since it uses less digits than its factorization.

13133409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 13133409 is about 3624.0045529773. The cubic root of 13133409 is about 235.9350642469.

The spelling of 13133409 in words is "thirteen million, one hundred thirty-three thousand, four hundred nine".