726220673 has 4 divisors (see below), whose sum is σ = 726665940. Its totient is φ = 725775408.

The previous prime is 726220661. The next prime is 726220711. The reversal of 726220673 is 376022627.

726220673 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 an emirpimes, since its reverse is a distinct semiprime: 376022627 = 1103 ⋅340909.

It can be written as a sum of positive squares in 2 ways, for example, as 126607504 + 599613169 = 11252^2 + 24487^2 .

It is a cyclic number.

It is not a de Polignac number, because 726220673 - 2⁴ = 726220657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726220633) 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, 220178 + ... + 223451.

It is an arithmetic number, because the mean of its divisors is an integer number (181666485).

Almost surely, 2^726220673 is an apocalyptic number.

It is an amenable number.

726220673 is a deficient number, since it is larger than the sum of its proper divisors (445267).

726220673 is a wasteful number, since it uses less digits than its factorization.

726220673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445266.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 726220673 is about 26948.4818310791. The cubic root of 726220673 is about 898.8547874156.

The spelling of 726220673 in words is "seven hundred twenty-six million, two hundred twenty thousand, six hundred seventy-three".