12013809 has 8 divisors (see below), whose sum is σ = 16079040. Its totient is φ = 7978896.

The previous prime is 12013787. The next prime is 12013847. The reversal of 12013809 is 90831021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12013809 - 2⁵ = 12013777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12013009) 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 7 ways as a sum of consecutive naturals, for example, 6637 + ... + 8250.

It is an arithmetic number, because the mean of its divisors is an integer number (2009880).

Almost surely, 2^12013809 is an apocalyptic number.

It is an amenable number.

12013809 is a deficient number, since it is larger than the sum of its proper divisors (4065231).

12013809 is a wasteful number, since it uses less digits than its factorization.

12013809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15159.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 12013809 is about 3466.0941995278. The cubic root of 12013809 is about 229.0306335074.

The spelling of 12013809 in words is "twelve million, thirteen thousand, eight hundred nine".