13509899 has 8 divisors (see below), whose sum is σ = 14662032. Its totient is φ = 12373920.

The previous prime is 13509889. The next prime is 13509913. The reversal of 13509899 is 99890531.

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

It is a de Polignac number, because none of the positive numbers 2^k-13509899 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (13509829) 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 7 ways as a sum of consecutive naturals, for example, 2264 + ... + 5669.

It is an arithmetic number, because the mean of its divisors is an integer number (1832754).

Almost surely, 2^13509899 is an apocalyptic number.

13509899 is a deficient number, since it is larger than the sum of its proper divisors (1152133).

13509899 is a wasteful number, since it uses less digits than its factorization.

13509899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8077.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 13509899 is about 3675.5814506007. The cubic root of 13509899 is about 238.1683424021.

The spelling of 13509899 in words is "thirteen million, five hundred nine thousand, eight hundred ninety-nine".