13988549 has 4 divisors (see below), whose sum is σ = 14000736. Its totient is φ = 13976364.

The previous prime is 13988539. The next prime is 13988551. The reversal of 13988549 is 94588931.

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-13988549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4169 + ... + 6734.

It is an arithmetic number, because the mean of its divisors is an integer number (3500184).

Almost surely, 2^13988549 is an apocalyptic number.

It is an amenable number.

13988549 is a deficient number, since it is larger than the sum of its proper divisors (12187).

13988549 is a wasteful number, since it uses less digits than its factorization.

13988549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12186.

The product of its digits is 311040, while the sum is 47.

The square root of 13988549 is about 3740.1268695059. The cubic root of 13988549 is about 240.9484976865.

It can be divided in two parts, 139 and 88549, that added together give a palindrome (88688).

The spelling of 13988549 in words is "thirteen million, nine hundred eighty-eight thousand, five hundred forty-nine".