13988191 has 8 divisors (see below), whose sum is σ = 16009760. Its totient is φ = 11972448.

The previous prime is 13988189. The next prime is 13988203. The reversal of 13988191 is 19188931.

It is a happy number.

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 13988191 - 2¹ = 13988189 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 (13988141) 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, 6925 + ... + 8713.

It is an arithmetic number, because the mean of its divisors is an integer number (2001220).

Almost surely, 2^13988191 is an apocalyptic number.

13988191 is a deficient number, since it is larger than the sum of its proper divisors (2021569).

13988191 is a wasteful number, since it uses less digits than its factorization.

13988191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913.

The product of its digits is 15552, while the sum is 40.

The square root of 13988191 is about 3740.0790098606. The cubic root of 13988191 is about 240.9464421886.

The spelling of 13988191 in words is "thirteen million, nine hundred eighty-eight thousand, one hundred ninety-one".