13667717 has 12 divisors (see below), whose sum is σ = 16121196. Its totient is φ = 11551680.

The previous prime is 13667701. The next prime is 13667747. The reversal of 13667717 is 71776631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10278436 + 3389281 = 3206^2 + 1841^2 .

It is not a de Polignac number, because 13667717 - 2⁴ = 13667701 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13667747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1667 + ... + 5487.

It is an arithmetic number, because the mean of its divisors is an integer number (1343433).

Almost surely, 2^13667717 is an apocalyptic number.

It is an amenable number.

13667717 is a deficient number, since it is larger than the sum of its proper divisors (2453479).

13667717 is an equidigital number, since it uses as much as digits as its factorization.

13667717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908 (or 3901 counting only the distinct ones).

The product of its digits is 37044, while the sum is 38.

The square root of 13667717 is about 3696.9875574581. The cubic root of 13667717 is about 239.0921547248.

The spelling of 13667717 in words is "thirteen million, six hundred sixty-seven thousand, seven hundred seventeen".