723329 has 4 divisors (see below), whose sum is σ = 730884. Its totient is φ = 715776.

The previous prime is 723319. The next prime is 723337. The reversal of 723329 is 923327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923327 = 67 ⋅13781.

It can be written as a sum of positive squares in 2 ways, for example, as 270400 + 452929 = 520^2 + 673^2 .

It is a cyclic number.

It is not a de Polignac number, because 723329 - 2¹⁶ = 657793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 723298 and 723307.

It is not an unprimeable number, because it can be changed into a prime (723319) 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, 3632 + ... + 3825.

It is an arithmetic number, because the mean of its divisors is an integer number (182721).

2⁷²³³²⁹ is an apocalyptic number.

It is an amenable number.

723329 is a deficient number, since it is larger than the sum of its proper divisors (7555).

723329 is an equidigital number, since it uses as much as digits as its factorization.

723329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7554.

The product of its digits is 2268, while the sum is 26.

The square root of 723329 is about 850.4875072569. The cubic root of 723329 is about 89.7660177338.

The spelling of 723329 in words is "seven hundred twenty-three thousand, three hundred twenty-nine".