729223 has 4 divisors (see below), whose sum is σ = 795528. Its totient is φ = 662920.

The previous prime is 729217. The next prime is 729257. The reversal of 729223 is 322927.

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 729223 - 2⁵ = 729191 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 (729203) 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, 33136 + ... + 33157.

It is an arithmetic number, because the mean of its divisors is an integer number (198882).

2⁷²⁹²²³ is an apocalyptic number.

729223 is a deficient number, since it is larger than the sum of its proper divisors (66305).

729223 is a wasteful number, since it uses less digits than its factorization.

729223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66304.

The product of its digits is 1512, while the sum is 25.

The square root of 729223 is about 853.9455486154. The cubic root of 729223 is about 90.0091760192.

The spelling of 729223 in words is "seven hundred twenty-nine thousand, two hundred twenty-three".