13729993 has 4 divisors (see below), whose sum is σ = 14172928. Its totient is φ = 13287060.

The previous prime is 13729973. The next prime is 13730023. The reversal of 13729993 is 39992731.

13729993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13729993 - 2⁹ = 13729481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13729973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221421 + ... + 221482.

It is an arithmetic number, because the mean of its divisors is an integer number (3543232).

Almost surely, 2^13729993 is an apocalyptic number.

It is an amenable number.

13729993 is a deficient number, since it is larger than the sum of its proper divisors (442935).

13729993 is an equidigital number, since it uses as much as digits as its factorization.

13729993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442934.

The product of its digits is 91854, while the sum is 43.

The square root of 13729993 is about 3705.4005181626. The cubic root of 13729993 is about 239.4547401629.

The spelling of 13729993 in words is "thirteen million, seven hundred twenty-nine thousand, nine hundred ninety-three".