726558869 has 4 divisors (see below), whose sum is σ = 769297644. Its totient is φ = 683820096.

The previous prime is 726558851. The next prime is 726558871. The reversal of 726558869 is 968855627.

726558869 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: 968855627 = 2797 ⋅346391.

It can be written as a sum of positive squares in 2 ways, for example, as 520980625 + 205578244 = 22825^2 + 14338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726558869 is a prime.

It is a super-2 number, since 2×726558869² = 1055775580245118322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726558829) 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, 21369362 + ... + 21369395.

It is an arithmetic number, because the mean of its divisors is an integer number (192324411).

Almost surely, 2^726558869 is an apocalyptic number.

It is an amenable number.

726558869 is a deficient number, since it is larger than the sum of its proper divisors (42738775).

726558869 is a wasteful number, since it uses less digits than its factorization.

726558869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42738774.

The product of its digits is 7257600, while the sum is 56.

The square root of 726558869 is about 26954.7559625384. The cubic root of 726558869 is about 898.9942959372.

The spelling of 726558869 in words is "seven hundred twenty-six million, five hundred fifty-eight thousand, eight hundred sixty-nine".