13170729 has 24 divisors (see below), whose sum is σ = 20794816. Its totient is φ = 7365600.

The previous prime is 13170721. The next prime is 13170739. The reversal of 13170729 is 92707131.

13170729 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 13170729 - 2³ = 13170721 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13170696 and 13170705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13170721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3324 + ... + 6114.

Almost surely, 2^13170729 is an apocalyptic number.

It is an amenable number.

13170729 is a deficient number, since it is larger than the sum of its proper divisors (7624087).

13170729 is a wasteful number, since it uses less digits than its factorization.

13170729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829 (or 2818 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 13170729 is about 3629.1499004588. The cubic root of 13170729 is about 236.1583312227.

The spelling of 13170729 in words is "thirteen million, one hundred seventy thousand, seven hundred twenty-nine".