13998549 has 4 divisors (see below), whose sum is σ = 18664736. Its totient is φ = 9332364.

The previous prime is 13998493. The next prime is 13998557. The reversal of 13998549 is 94589931.

13998549 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94589931 = 3 ⋅31529977.

It is not a de Polignac number, because 13998549 - 2¹⁵ = 13965781 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13998498 and 13998507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13990549) 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, 2333089 + ... + 2333094.

It is an arithmetic number, because the mean of its divisors is an integer number (4666184).

Almost surely, 2^13998549 is an apocalyptic number.

It is an amenable number.

13998549 is a deficient number, since it is larger than the sum of its proper divisors (4666187).

13998549 is an equidigital number, since it uses as much as digits as its factorization.

13998549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4666186.

The product of its digits is 349920, while the sum is 48.

The square root of 13998549 is about 3741.4634837186. The cubic root of 13998549 is about 241.0058996622.

The spelling of 13998549 in words is "thirteen million, nine hundred ninety-eight thousand, five hundred forty-nine".