13508889 has 8 divisors (see below), whose sum is σ = 18795072. Its totient is φ = 8614320.

The previous prime is 13508879. The next prime is 13508917. The reversal of 13508889 is 98880531.

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

It is not a de Polignac number, because 13508889 - 2⁹ = 13508377 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13508889.

It is not an unprimeable number, because it can be changed into a prime (13508819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97822 + ... + 97959.

It is an arithmetic number, because the mean of its divisors is an integer number (2349384).

Almost surely, 2^13508889 is an apocalyptic number.

It is an amenable number.

13508889 is a deficient number, since it is larger than the sum of its proper divisors (5286183).

13508889 is a wasteful number, since it uses less digits than its factorization.

13508889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195807.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 13508889 is about 3675.4440548048. Note that the first 3 decimals coincide. The cubic root of 13508889 is about 238.1624070993.

The spelling of 13508889 in words is "thirteen million, five hundred eight thousand, eight hundred eighty-nine".