729449 has 4 divisors (see below), whose sum is σ = 833664. Its totient is φ = 625236.

The previous prime is 729413. The next prime is 729451. The reversal of 729449 is 944927.

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 a de Polignac number, because none of the positive numbers 2^k-729449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729649) 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, 52097 + ... + 52110.

It is an arithmetic number, because the mean of its divisors is an integer number (208416).

2⁷²⁹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

729449 is a deficient number, since it is larger than the sum of its proper divisors (104215).

729449 is a wasteful number, since it uses less digits than its factorization.

729449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104214.

The product of its digits is 18144, while the sum is 35.

The square root of 729449 is about 854.0778653027. The cubic root of 729449 is about 90.0184735741.

The spelling of 729449 in words is "seven hundred twenty-nine thousand, four hundred forty-nine".