13047 has 4 divisors (see below), whose sum is σ = 17400. Its totient is φ = 8696.

The previous prime is 13043. The next prime is 13049. The reversal of 13047 is 74031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74031 = 3 ⋅24677.

It is a cyclic number.

It is not a de Polignac number, because 13047 - 2² = 13043 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13043) 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, 2172 + ... + 2177.

It is an arithmetic number, because the mean of its divisors is an integer number (4350).

2¹³⁰⁴⁷ is an apocalyptic number.

13047 is a deficient number, since it is larger than the sum of its proper divisors (4353).

13047 is an equidigital number, since it uses as much as digits as its factorization.

13047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 13047 is about 114.2234651900. The cubic root of 13047 is about 23.5416493939.

Adding to 13047 its product of nonzero digits (84), we get a palindrome (13131).

Adding to 13047 its reverse (74031), we get a palindrome (87078).

The spelling of 13047 in words is "thirteen thousand, forty-seven".