13186617889 has 3 divisors (see below), whose sum is σ = 13186732723. Its totient is φ = 13186503056.

The previous prime is 13186617881. The next prime is 13186617911. The reversal of 13186617889 is 98871668131.

The square root of 13186617889 is 114833.

It is a perfect power (a square), and thus also a powerful number.

13186617889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98871668131 = 397 ⋅249047023.

It can be written as a sum of positive squares in only one way, i.e., 51624225 + 13134993664 = 7185^2 + 114608^2 .

It is not a de Polignac number, because 13186617889 - 2³ = 13186617881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13186617881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 57417 + ... + 172249.

Almost surely, 2^13186617889 is an apocalyptic number.

13186617889 is the 114833-rd square number.

13186617889 is the 57417-th centered octagonal number.

It is an amenable number.

13186617889 is a deficient number, since it is larger than the sum of its proper divisors (114834).

13186617889 is an frugal number, since it uses more digits than its factorization.

13186617889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229666 (or 114833 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 58.

The spelling of 13186617889 in words is "thirteen billion, one hundred eighty-six million, six hundred seventeen thousand, eight hundred eighty-nine".