13681427 has 4 divisors (see below), whose sum is σ = 13693920. Its totient is φ = 13668936.

The previous prime is 13681399. The next prime is 13681429. The reversal of 13681427 is 72418631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13681427 - 2⁶ = 13681363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13681393 and 13681402.

It is not an unprimeable number, because it can be changed into a prime (13681429) 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, 4427 + ... + 6852.

It is an arithmetic number, because the mean of its divisors is an integer number (3423480).

Almost surely, 2^13681427 is an apocalyptic number.

13681427 is a deficient number, since it is larger than the sum of its proper divisors (12493).

13681427 is a wasteful number, since it uses less digits than its factorization.

13681427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12492.

The product of its digits is 8064, while the sum is 32.

The square root of 13681427 is about 3698.8413050576. The cubic root of 13681427 is about 239.1720719492.

The spelling of 13681427 in words is "thirteen million, six hundred eighty-one thousand, four hundred twenty-seven".