13799905729 has 9 divisors (see below), whose sum is σ = 13986204897. Its totient is φ = 13616060484.

The previous prime is 13799905711. The next prime is 13799905739. The reversal of 13799905729 is 92750999731.

The square root of 13799905729 is 117473.

It is a perfect power (a square), and thus also a powerful number.

13799905729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13799905729 - 2⁵ = 13799905697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13799905739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9279624 + ... + 9281110.

Almost surely, 2^13799905729 is an apocalyptic number.

13799905729 is the 117473-rd square number.

13799905729 is the 58737-th centered octagonal number.

It is an amenable number.

13799905729 is a deficient number, since it is larger than the sum of its proper divisors (186299168).

13799905729 is an frugal number, since it uses more digits than its factorization.

13799905729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 9644670, while the sum is 61.

The spelling of 13799905729 in words is "thirteen billion, seven hundred ninety-nine million, nine hundred five thousand, seven hundred twenty-nine".