726270709 has 4 divisors (see below), whose sum is σ = 731989504. Its totient is φ = 720551916.

The previous prime is 726270703. The next prime is 726270733. The reversal of 726270709 is 907072627.

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.

It is a cyclic number.

It is not a de Polignac number, because 726270709 - 2⁹ = 726270197 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 (726270703) 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, 2859207 + ... + 2859460.

It is an arithmetic number, because the mean of its divisors is an integer number (182997376).

Almost surely, 2^726270709 is an apocalyptic number.

It is an amenable number.

726270709 is a deficient number, since it is larger than the sum of its proper divisors (5718795).

726270709 is a wasteful number, since it uses less digits than its factorization.

726270709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5718794.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 726270709 is about 26949.4101790744. The cubic root of 726270709 is about 898.8754303905.

The spelling of 726270709 in words is "seven hundred twenty-six million, two hundred seventy thousand, seven hundred nine".