729219 has 4 divisors (see below), whose sum is σ = 972296. Its totient is φ = 486144.

The previous prime is 729217. The next prime is 729257. The reversal of 729219 is 912927.

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

It is not a de Polignac number, because 729219 - 2¹ = 729217 is a prime.

It is a super-2 number, since 2×729219² = 1063520699922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121534 + ... + 121539.

It is an arithmetic number, because the mean of its divisors is an integer number (243074).

2⁷²⁹²¹⁹ is an apocalyptic number.

729219 is a deficient number, since it is larger than the sum of its proper divisors (243077).

729219 is a wasteful number, since it uses less digits than its factorization.

729219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243076.

The product of its digits is 2268, while the sum is 30.

The square root of 729219 is about 853.9432065424. The cubic root of 729219 is about 90.0090114434.

The spelling of 729219 in words is "seven hundred twenty-nine thousand, two hundred nineteen".