13809889671 has 4 divisors (see below), whose sum is σ = 18413186232. Its totient is φ = 9206593112.

The previous prime is 13809889663. The next prime is 13809889699. The reversal of 13809889671 is 17698890831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13809889671 - 2³ = 13809889663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809889661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2301648276 + ... + 2301648281.

It is an arithmetic number, because the mean of its divisors is an integer number (4603296558).

Almost surely, 2^13809889671 is an apocalyptic number.

13809889671 is a deficient number, since it is larger than the sum of its proper divisors (4603296561).

13809889671 is an equidigital number, since it uses as much as digits as its factorization.

13809889671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603296560.

The product of its (nonzero) digits is 5225472, while the sum is 60.

The spelling of 13809889671 in words is "thirteen billion, eight hundred nine million, eight hundred eighty-nine thousand, six hundred seventy-one".