726708647 has 4 divisors (see below), whose sum is σ = 830524176. Its totient is φ = 622893120.

The previous prime is 726708617. The next prime is 726708679. The reversal of 726708647 is 746807627.

726708647 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: 746807627 = 11251 ⋅66377.

It is a cyclic number.

It is not a de Polignac number, because 726708647 - 2¹⁸ = 726446503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726708607) 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, 51907754 + ... + 51907767.

It is an arithmetic number, because the mean of its divisors is an integer number (207631044).

Almost surely, 2^726708647 is an apocalyptic number.

726708647 is a deficient number, since it is larger than the sum of its proper divisors (103815529).

726708647 is a wasteful number, since it uses less digits than its factorization.

726708647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103815528.

The product of its (nonzero) digits is 790272, while the sum is 47.

The square root of 726708647 is about 26957.5341416829. The cubic root of 726708647 is about 899.0560667135.

The spelling of 726708647 in words is "seven hundred twenty-six million, seven hundred eight thousand, six hundred forty-seven".