13235809 has 8 divisors (see below), whose sum is σ = 14152320. Its totient is φ = 12334656.

The previous prime is 13235801. The next prime is 13235863. The reversal of 13235809 is 90853231.

It is a happy number.

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

It is not a de Polignac number, because 13235809 - 2³ = 13235801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13235801) 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, 2029 + ... + 5530.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^13235809 is an apocalyptic number.

It is an amenable number.

13235809 is a deficient number, since it is larger than the sum of its proper divisors (916511).

13235809 is a wasteful number, since it uses less digits than its factorization.

13235809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7679.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 13235809 is about 3638.1051386677. The cubic root of 13235809 is about 236.5466655632.

The spelling of 13235809 in words is "thirteen million, two hundred thirty-five thousand, eight hundred nine".