13509907 has 4 divisors (see below), whose sum is σ = 13532560. Its totient is φ = 13487256.

The previous prime is 13509889. The next prime is 13509913. The reversal of 13509907 is 70990531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13509907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13509967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10407 + ... + 11632.

It is an arithmetic number, because the mean of its divisors is an integer number (3383140).

Almost surely, 2^13509907 is an apocalyptic number.

13509907 is a deficient number, since it is larger than the sum of its proper divisors (22653).

13509907 is an equidigital number, since it uses as much as digits as its factorization.

13509907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22652.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 13509907 is about 3675.5825388637. The cubic root of 13509907 is about 238.1683894132.

The spelling of 13509907 in words is "thirteen million, five hundred nine thousand, nine hundred seven".