726731791 has 8 divisors (see below), whose sum is σ = 750509568. Its totient is φ = 702975000.

The previous prime is 726731783. The next prime is 726731839. The reversal of 726731791 is 197137627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 726731791 - 2³ = 726731783 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 (726731711) 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 7 ways as a sum of consecutive naturals, for example, 97176 + ... + 104386.

It is an arithmetic number, because the mean of its divisors is an integer number (93813696).

Almost surely, 2^726731791 is an apocalyptic number.

726731791 is a deficient number, since it is larger than the sum of its proper divisors (23777777).

726731791 is a wasteful number, since it uses less digits than its factorization.

726731791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10493.

The product of its digits is 111132, while the sum is 43.

The square root of 726731791 is about 26957.9634060142. The cubic root of 726731791 is about 899.0656109019.

The spelling of 726731791 in words is "seven hundred twenty-six million, seven hundred thirty-one thousand, seven hundred ninety-one".