13481647 has 4 divisors (see below), whose sum is σ = 13489000. Its totient is φ = 13474296.

The previous prime is 13481639. The next prime is 13481681. The reversal of 13481647 is 74618431.

It is a happy number.

13481647 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74618431 = 1373 ⋅54347.

It is a cyclic number.

It is not a de Polignac number, because 13481647 - 2³ = 13481639 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 (13481617) 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, 1573 + ... + 5425.

It is an arithmetic number, because the mean of its divisors is an integer number (3372250).

Almost surely, 2^13481647 is an apocalyptic number.

13481647 is a deficient number, since it is larger than the sum of its proper divisors (7353).

13481647 is an equidigital number, since it uses as much as digits as its factorization.

13481647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7352.

The product of its digits is 16128, while the sum is 34.

The square root of 13481647 is about 3671.7362378036. The cubic root of 13481647 is about 238.0022067446.

The spelling of 13481647 in words is "thirteen million, four hundred eighty-one thousand, six hundred forty-seven".