729903 has 4 divisors (see below), whose sum is σ = 973208. Its totient is φ = 486600.

The previous prime is 729877. The next prime is 729907. The reversal of 729903 is 309927.

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

It is not a de Polignac number, because 729903 - 2⁵ = 729871 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729907) 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, 121648 + ... + 121653.

It is an arithmetic number, because the mean of its divisors is an integer number (243302).

2⁷²⁹⁹⁰³ is an apocalyptic number.

729903 is a deficient number, since it is larger than the sum of its proper divisors (243305).

729903 is a wasteful number, since it uses less digits than its factorization.

729903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243304.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 729903 is about 854.3436076896. The cubic root of 729903 is about 90.0371451610.

The spelling of 729903 in words is "seven hundred twenty-nine thousand, nine hundred three".