726713 has 4 divisors (see below), whose sum is σ = 782628. Its totient is φ = 670800.

The previous prime is 726707. The next prime is 726751. The reversal of 726713 is 317627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426409 + 300304 = 653^2 + 548^2 .

It is not a de Polignac number, because 726713 - 2⁴ = 726697 is a prime.

It is a super-2 number, since 2×726713² = 1056223568738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (726013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27938 + ... + 27963.

It is an arithmetic number, because the mean of its divisors is an integer number (195657).

2⁷²⁶⁷¹³ is an apocalyptic number.

It is an amenable number.

726713 is a deficient number, since it is larger than the sum of its proper divisors (55915).

726713 is a wasteful number, since it uses less digits than its factorization.

726713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55914.

The product of its digits is 1764, while the sum is 26.

The square root of 726713 is about 852.4746330537. The cubic root of 726713 is about 89.9057861832.

The spelling of 726713 in words is "seven hundred twenty-six thousand, seven hundred thirteen".