13681567 has 4 divisors (see below), whose sum is σ = 13692856. Its totient is φ = 13670280.

The previous prime is 13681541. The next prime is 13681589. The reversal of 13681567 is 76518631.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13681567 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 (13681537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3573 + ... + 6334.

It is an arithmetic number, because the mean of its divisors is an integer number (3423214).

Almost surely, 2^13681567 is an apocalyptic number.

13681567 is a deficient number, since it is larger than the sum of its proper divisors (11289).

13681567 is an equidigital number, since it uses as much as digits as its factorization.

13681567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11288.

The product of its digits is 30240, while the sum is 37.

The square root of 13681567 is about 3698.8602298546. The cubic root of 13681567 is about 239.1728877504.

The spelling of 13681567 in words is "thirteen million, six hundred eighty-one thousand, five hundred sixty-seven".