726934809 has 4 divisors (see below), whose sum is σ = 969246416. Its totient is φ = 484623204.

The previous prime is 726934799. The next prime is 726934847. The reversal of 726934809 is 908439627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 908439627 = 3 ⋅302813209.

It is not a de Polignac number, because 726934809 - 2⁵ = 726934777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726934309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121155799 + ... + 121155804.

It is an arithmetic number, because the mean of its divisors is an integer number (242311604).

Almost surely, 2^726934809 is an apocalyptic number.

It is an amenable number.

726934809 is a deficient number, since it is larger than the sum of its proper divisors (242311607).

726934809 is a wasteful number, since it uses less digits than its factorization.

726934809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242311606.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 726934809 is about 26961.7285981444. The cubic root of 726934809 is about 899.1493233574.

The spelling of 726934809 in words is "seven hundred twenty-six million, nine hundred thirty-four thousand, eight hundred nine".