13194427689 has 15 divisors (see below), whose sum is σ = 19711738893. Its totient is φ = 8795595924.

The previous prime is 13194427679. The next prime is 13194427693. The reversal of 13194427689 is 98672449131.

The square root of 13194427689 is 114867.

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

13194427689 is a `hidden beast` number, since 131 + 9 + 4 + 427 + 6 + 89 = 666.

It is not a de Polignac number, because 13194427689 - 2¹¹ = 13194425641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13194427679) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1027422 + ... + 1040184.

Almost surely, 2^13194427689 is an apocalyptic number.

13194427689 is the 114867-th square number.

13194427689 is the 57434-th centered octagonal number.

It is an amenable number.

13194427689 is a deficient number, since it is larger than the sum of its proper divisors (6517311204).

13194427689 is an frugal number, since it uses more digits than its factorization.

13194427689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25538 (or 12766 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 13194427689 in words is "thirteen billion, one hundred ninety-four million, four hundred twenty-seven thousand, six hundred eighty-nine".