726385321 has 4 divisors (see below), whose sum is σ = 726439252. Its totient is φ = 726331392.

The previous prime is 726385237. The next prime is 726385393. The reversal of 726385321 is 123583627.

726385321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 123583627 = 2417 ⋅51131.

It can be written as a sum of positive squares in 2 ways, for example, as 432640000 + 293745321 = 20800^2 + 17139^2 .

It is a cyclic number.

It is not a de Polignac number, because 726385321 - 2²⁵ = 692830889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726385021) 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, 12205 + ... + 40021.

It is an arithmetic number, because the mean of its divisors is an integer number (181609813).

Almost surely, 2^726385321 is an apocalyptic number.

It is an amenable number.

726385321 is a deficient number, since it is larger than the sum of its proper divisors (53931).

726385321 is a wasteful number, since it uses less digits than its factorization.

726385321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53930.

The product of its digits is 60480, while the sum is 37.

The square root of 726385321 is about 26951.5365239164. The cubic root of 726385321 is about 898.9227114253.

The spelling of 726385321 in words is "seven hundred twenty-six million, three hundred eighty-five thousand, three hundred twenty-one".