13999993 has 16 divisors (see below), whose sum is σ = 17190144. Its totient is φ = 11128320.

The previous prime is 13999981. The next prime is 14000029. The reversal of 13999993 is 39999931.

13999993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13999993 - 2⁵ = 13999961 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 13999993.

It is not an unprimeable number, because it can be changed into a prime (13999393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7621 + ... + 9277.

It is an arithmetic number, because the mean of its divisors is an integer number (1074384).

Almost surely, 2^13999993 is an apocalyptic number.

It is an amenable number.

13999993 is a deficient number, since it is larger than the sum of its proper divisors (3190151).

13999993 is a wasteful number, since it uses less digits than its factorization.

13999993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752.

The product of its digits is 531441, while the sum is 52.

The square root of 13999993 is about 3741.6564513595. The cubic root of 13999993 is about 241.0141862485.

The spelling of 13999993 in words is "thirteen million, nine hundred ninety-nine thousand, nine hundred ninety-three".