13664717 has 8 divisors (see below), whose sum is σ = 15130272. Its totient is φ = 12236400.

The previous prime is 13664711. The next prime is 13664723. The reversal of 13664717 is 71746631.

It is an interprime number because it is at equal distance from previous prime (13664711) and next prime (13664723).

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

It is not a de Polignac number, because 13664717 - 2⁶ = 13664653 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 (13664711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8534 + ... + 10007.

It is an arithmetic number, because the mean of its divisors is an integer number (1891284).

Almost surely, 2^13664717 is an apocalyptic number.

It is an amenable number.

13664717 is a deficient number, since it is larger than the sum of its proper divisors (1465555).

13664717 is a wasteful number, since it uses less digits than its factorization.

13664717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18619.

The product of its digits is 21168, while the sum is 35.

The square root of 13664717 is about 3696.5817994466. The cubic root of 13664717 is about 239.0746602412.

The spelling of 13664717 in words is "thirteen million, six hundred sixty-four thousand, seven hundred seventeen".