13668571 has 4 divisors (see below), whose sum is σ = 15621232. Its totient is φ = 11715912.

The previous prime is 13668569. The next prime is 13668583. The reversal of 13668571 is 17586631.

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 13668571 - 2¹ = 13668569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13668571.

It is not an unprimeable number, because it can be changed into a prime (13668521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976320 + ... + 976333.

It is an arithmetic number, because the mean of its divisors is an integer number (3905308).

Almost surely, 2^13668571 is an apocalyptic number.

13668571 is a deficient number, since it is larger than the sum of its proper divisors (1952661).

13668571 is an equidigital number, since it uses as much as digits as its factorization.

13668571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952660.

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

The square root of 13668571 is about 3697.1030550960. The cubic root of 13668571 is about 239.0971343530.

The spelling of 13668571 in words is "thirteen million, six hundred sixty-eight thousand, five hundred seventy-one".