13998559 has 4 divisors (see below), whose sum is σ = 14607216. Its totient is φ = 13389904.

The previous prime is 13998557. The next prime is 13998587. The reversal of 13998559 is 95589931.

It is a happy number.

13998559 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13998559 - 2¹ = 13998557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13998557) 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, 304294 + ... + 304339.

It is an arithmetic number, because the mean of its divisors is an integer number (3651804).

Almost surely, 2^13998559 is an apocalyptic number.

13998559 is a deficient number, since it is larger than the sum of its proper divisors (608657).

13998559 is an equidigital number, since it uses as much as digits as its factorization.

13998559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608656.

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

The square root of 13998559 is about 3741.4648200939. The cubic root of 13998559 is about 241.0059570505.

The spelling of 13998559 in words is "thirteen million, nine hundred ninety-eight thousand, five hundred fifty-nine".