726739 has 4 divisors (see below), whose sum is σ = 782656.
Its totient is φ = 670824.
The previous prime is 726707. The next prime is 726751. The reversal of 726739 is 937627.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 726739 - 25 = 726707 is a prime.
It is a Duffinian number.
726739 is a lucky number.
It is not an unprimeable number, because it can be changed into a prime (726779) 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, 27939 + ... + 27964.
It is an arithmetic number, because the mean of its divisors is an integer number (195664).
2726739 is an apocalyptic number.
726739 is a deficient number, since it is larger than the sum of its proper divisors (55917).
726739 is a wasteful number, since it uses less digits than its factorization.
726739 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 55916.
The product of its digits is 15876, while the sum is 34.
The square root of 726739 is about 852.4898826379.
The cubic root of 726739 is about 89.9068583728.
The spelling of 726739 in words is "seven hundred twenty-six thousand, seven hundred thirty-nine".