726729 has 4 divisors (see below), whose sum is σ = 968976. Its totient is φ = 484484.

The previous prime is 726707. The next prime is 726751. The reversal of 726729 is 927627.

726729 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (726707) and next prime (726751).

It is a cyclic number.

It is not a de Polignac number, because 726729 - 2⁵ = 726697 is a prime.

It is a D-number.

726729 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 726729.

It is not an unprimeable number, because it can be changed into a prime (726779) 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, 121119 + ... + 121124.

It is an arithmetic number, because the mean of its divisors is an integer number (242244).

2⁷²⁶⁷²⁹ is an apocalyptic number.

It is an amenable number.

726729 is a deficient number, since it is larger than the sum of its proper divisors (242247).

726729 is a wasteful number, since it uses less digits than its factorization.

726729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242246.

The product of its digits is 10584, while the sum is 33.

The square root of 726729 is about 852.4840174455. The cubic root of 726729 is about 89.9064459952.

The spelling of 726729 in words is "seven hundred twenty-six thousand, seven hundred twenty-nine".