729129 has 8 divisors (see below), whose sum is σ = 976320. Its totient is φ = 484016.

The previous prime is 729073. The next prime is 729139. The reversal of 729129 is 921927.

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 729129 - 2⁸ = 728873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 729096 and 729105.

It is not an unprimeable number, because it can be changed into a prime (729139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739 + ... + 1415.

It is an arithmetic number, because the mean of its divisors is an integer number (122040).

2⁷²⁹¹²⁹ is an apocalyptic number.

It is an amenable number.

729129 is a deficient number, since it is larger than the sum of its proper divisors (247191).

729129 is a wasteful number, since it uses less digits than its factorization.

729129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039.

The product of its digits is 2268, while the sum is 30.

The square root of 729129 is about 853.8905082035. The cubic root of 729129 is about 90.0053083289.

It can be divided in two parts, 729 and 129, that added together give a palindrome (858).

The spelling of 729129 in words is "seven hundred twenty-nine thousand, one hundred twenty-nine".