13447 has 8 divisors (see below), whose sum is σ = 16416. Its totient is φ = 10752.

The previous prime is 13441. The next prime is 13451. The reversal of 13447 is 74431.

It is a happy number.

13447 is nontrivially palindromic in base 4.

13447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13447 - 2¹¹ = 11399 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63 + ... + 175.

It is an arithmetic number, because the mean of its divisors is an integer number (2052).

2¹³⁴⁴⁷ is an apocalyptic number.

13447 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13447 is a deficient number, since it is larger than the sum of its proper divisors (2969).

13447 is a wasteful number, since it uses less digits than its factorization.

13447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137.

The product of its digits is 336, while the sum is 19.

The square root of 13447 is about 115.9612004077. The cubic root of 13447 is about 23.7798148182.

Adding to 13447 its reverse (74431), we get a palindrome (87878).

It can be divided in two parts, 134 and 47, that added together give a palindrome (181).

The spelling of 13447 in words is "thirteen thousand, four hundred forty-seven".