13018889 has 8 divisors (see below), whose sum is σ = 14845320. Its totient is φ = 11310336.

The previous prime is 13018871. The next prime is 13018909. The reversal of 13018889 is 98881031.

13018889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1225 + 13017664 = 35^2 + 3608^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13018889 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 (13018289) 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, 29234 + ... + 29675.

It is an arithmetic number, because the mean of its divisors is an integer number (1855665).

Almost surely, 2^13018889 is an apocalyptic number.

It is an amenable number.

13018889 is a deficient number, since it is larger than the sum of its proper divisors (1826431).

13018889 is a wasteful number, since it uses less digits than its factorization.

13018889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58939.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 13018889 is about 3608.1697576472. The cubic root of 13018889 is about 235.2472966359.

The spelling of 13018889 in words is "thirteen million, eighteen thousand, eight hundred eighty-nine".