13988217 has 8 divisors (see below), whose sum is σ = 18825696. Its totient is φ = 9238112.

The previous prime is 13988213. The next prime is 13988231. The reversal of 13988217 is 71288931.

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

It is a cyclic number.

It is not a de Polignac number, because 13988217 - 2² = 13988213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13988213) 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, 21468 + ... + 22109.

It is an arithmetic number, because the mean of its divisors is an integer number (2353212).

Almost surely, 2^13988217 is an apocalyptic number.

It is an amenable number.

13988217 is a deficient number, since it is larger than the sum of its proper divisors (4837479).

13988217 is a wasteful number, since it uses less digits than its factorization.

13988217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43687.

The product of its digits is 24192, while the sum is 39.

The square root of 13988217 is about 3740.0824857214. The cubic root of 13988217 is about 240.9465914718.

The spelling of 13988217 in words is "thirteen million, nine hundred eighty-eight thousand, two hundred seventeen".