729273 has 4 divisors (see below), whose sum is σ = 972368. Its totient is φ = 486180.

The previous prime is 729271. The next prime is 729293. The reversal of 729273 is 372927.

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, and also an emirpimes, since its reverse is a distinct semiprime: 372927 = 3 ⋅124309.

It is not a de Polignac number, because 729273 - 2¹ = 729271 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

729273 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 729273.

It is not an unprimeable number, because it can be changed into a prime (729271) 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, 121543 + ... + 121548.

It is an arithmetic number, because the mean of its divisors is an integer number (243092).

2⁷²⁹²⁷³ is an apocalyptic number.

It is an amenable number.

729273 is a deficient number, since it is larger than the sum of its proper divisors (243095).

729273 is a wasteful number, since it uses less digits than its factorization.

729273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243094.

The product of its digits is 5292, while the sum is 30.

The square root of 729273 is about 853.9748239849. The cubic root of 729273 is about 90.0112331658.

The spelling of 729273 in words is "seven hundred twenty-nine thousand, two hundred seventy-three".