13549 has 4 divisors (see below), whose sum is σ = 14364. Its totient is φ = 12736.

The previous prime is 13537. The next prime is 13553. The reversal of 13549 is 94531.

13549 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 can be written as a sum of positive squares in 2 ways, for example, as 8649 + 4900 = 93^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 13549 - 2⁷ = 13421 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 (13049) 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, 382 + ... + 415.

It is an arithmetic number, because the mean of its divisors is an integer number (3591).

2¹³⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

13549 is a deficient number, since it is larger than the sum of its proper divisors (815).

13549 is an equidigital number, since it uses as much as digits as its factorization.

13549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814.

The product of its digits is 540, while the sum is 22.

The square root of 13549 is about 116.4001718212. The cubic root of 13549 is about 23.8397893845.

The spelling of 13549 in words is "thirteen thousand, five hundred forty-nine".