13989559 has 4 divisors (see below), whose sum is σ = 13997880. Its totient is φ = 13981240.

The previous prime is 13989541. The next prime is 13989581. The reversal of 13989559 is 95598931.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 13989559 - 2⁹ = 13989047 is a prime.

It is a super-2 number, since 2×13989559² = 391415522028962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13980559) 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, 652 + ... + 5329.

It is an arithmetic number, because the mean of its divisors is an integer number (3499470).

Almost surely, 2^13989559 is an apocalyptic number.

13989559 is a deficient number, since it is larger than the sum of its proper divisors (8321).

13989559 is an equidigital number, since it uses as much as digits as its factorization.

13989559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8320.

The product of its digits is 437400, while the sum is 49.

The square root of 13989559 is about 3740.2618892265. The cubic root of 13989559 is about 240.9542965278.

It can be divided in two parts, 139 and 89559, that added together give a palindrome (89698).

The spelling of 13989559 in words is "thirteen million, nine hundred eighty-nine thousand, five hundred fifty-nine".