13678717 has 8 divisors (see below), whose sum is σ = 15009624. Its totient is φ = 12387648.

The previous prime is 13678699. The next prime is 13678723. The reversal of 13678717 is 71787631.

It can be written as a sum of positive squares in 4 ways, for example, as 217156 + 13461561 = 466^2 + 3669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13678717 - 2⁷ = 13678589 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 13678717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13678417) 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 7 ways as a sum of consecutive naturals, for example, 9238 + ... + 10615.

It is an arithmetic number, because the mean of its divisors is an integer number (1876203).

Almost surely, 2^13678717 is an apocalyptic number.

It is an amenable number.

13678717 is a deficient number, since it is larger than the sum of its proper divisors (1330907).

13678717 is a wasteful number, since it uses less digits than its factorization.

13678717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19919.

The product of its digits is 49392, while the sum is 40.

The square root of 13678717 is about 3698.4749559785. The cubic root of 13678717 is about 239.1562792711.

The spelling of 13678717 in words is "thirteen million, six hundred seventy-eight thousand, seven hundred seventeen".