726417871 has 4 divisors (see below), whose sum is σ = 769148352. Its totient is φ = 683687392.

The previous prime is 726417851. The next prime is 726417883. The reversal of 726417871 is 178714627.

726417871 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726417871 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 (726417821) 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, 21365215 + ... + 21365248.

It is an arithmetic number, because the mean of its divisors is an integer number (192287088).

Almost surely, 2^726417871 is an apocalyptic number.

726417871 is a deficient number, since it is larger than the sum of its proper divisors (42730481).

726417871 is a wasteful number, since it uses less digits than its factorization.

726417871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42730480.

The product of its digits is 131712, while the sum is 43.

The square root of 726417871 is about 26952.1403788271. The cubic root of 726417871 is about 898.9361384116.

The spelling of 726417871 in words is "seven hundred twenty-six million, four hundred seventeen thousand, eight hundred seventy-one".