13984991 has 8 divisors (see below), whose sum is σ = 14385600. Its totient is φ = 13588768.

The previous prime is 13984981. The next prime is 13985009. The reversal of 13984991 is 19948931.

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 13984991 - 2¹⁰ = 13983967 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 (13984961) 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, 6005 + ... + 8001.

It is an arithmetic number, because the mean of its divisors is an integer number (1798200).

Almost surely, 2^13984991 is an apocalyptic number.

13984991 is a deficient number, since it is larger than the sum of its proper divisors (400609).

13984991 is a wasteful number, since it uses less digits than its factorization.

13984991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193.

The product of its digits is 69984, while the sum is 44.

The square root of 13984991 is about 3739.6511869424. The cubic root of 13984991 is about 240.9280674653.

The spelling of 13984991 in words is "thirteen million, nine hundred eighty-four thousand, nine hundred ninety-one".