729439 has 4 divisors (see below), whose sum is σ = 743256. Its totient is φ = 715624.

The previous prime is 729413. The next prime is 729451. The reversal of 729439 is 934927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 729439 - 2⁹ = 728927 is a prime.

It is a Duffinian number.

It is a congruent number.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6829 + ... + 6934.

It is an arithmetic number, because the mean of its divisors is an integer number (185814).

2⁷²⁹⁴³⁹ is an apocalyptic number.

729439 is a deficient number, since it is larger than the sum of its proper divisors (13817).

729439 is a wasteful number, since it uses less digits than its factorization.

729439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13816.

The product of its digits is 13608, while the sum is 34.

The square root of 729439 is about 854.0720110155. The cubic root of 729439 is about 90.0180622184.

The spelling of 729439 in words is "seven hundred twenty-nine thousand, four hundred thirty-nine".