13449 has 4 divisors (see below), whose sum is σ = 17936. Its totient is φ = 8964.

The previous prime is 13441. The next prime is 13451. The reversal of 13449 is 94431.

Added to its reverse (94431) it gives a triangular number (107880 = T₄₆₄).

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: 94431 = 3 ⋅31477.

It is not a de Polignac number, because 13449 - 2³ = 13441 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 10 and base 16.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (13441) 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, 2239 + ... + 2244.

It is an arithmetic number, because the mean of its divisors is an integer number (4484).

2¹³⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

13449 is a deficient number, since it is larger than the sum of its proper divisors (4487).

13449 is an equidigital number, since it uses as much as digits as its factorization.

13449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486.

The product of its digits is 432, while the sum is 21.

The square root of 13449 is about 115.9698236612. The cubic root of 13449 is about 23.7809937001.

Adding to 13449 its reverse (94431), we get a triangular number (107880 = T₄₆₄).

The spelling of 13449 in words is "thirteen thousand, four hundred forty-nine".