13889561 has 8 divisors (see below), whose sum is σ = 16807680. Its totient is φ = 11204928.

The previous prime is 13889531. The next prime is 13889567. The reversal of 13889561 is 16598831.

13889561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13889561 - 2¹⁴ = 13873177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13889567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58241 + ... + 58478.

It is an arithmetic number, because the mean of its divisors is an integer number (2100960).

Almost surely, 2^13889561 is an apocalyptic number.

It is an amenable number.

13889561 is a deficient number, since it is larger than the sum of its proper divisors (2918119).

13889561 is a wasteful number, since it uses less digits than its factorization.

13889561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116743.

The product of its digits is 51840, while the sum is 41.

The square root of 13889561 is about 3726.8701345767. The cubic root of 13889561 is about 240.3788057299.

The spelling of 13889561 in words is "thirteen million, eight hundred eighty-nine thousand, five hundred sixty-one".