13684889 has 4 divisors (see below), whose sum is σ = 13817856. Its totient is φ = 13551924.

The previous prime is 13684877. The next prime is 13684961. The reversal of 13684889 is 98848631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13684889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13684859) 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, 66329 + ... + 66534.

It is an arithmetic number, because the mean of its divisors is an integer number (3454464).

Almost surely, 2^13684889 is an apocalyptic number.

It is an amenable number.

13684889 is a deficient number, since it is larger than the sum of its proper divisors (132967).

13684889 is a wasteful number, since it uses less digits than its factorization.

13684889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132966.

The product of its digits is 331776, while the sum is 47.

The square root of 13684889 is about 3699.3092598484. The cubic root of 13684889 is about 239.1922439162.

The spelling of 13684889 in words is "thirteen million, six hundred eighty-four thousand, eight hundred eighty-nine".