724039 has 4 divisors (see below), whose sum is σ = 727056. Its totient is φ = 721024.

The previous prime is 724021. The next prime is 724079. The reversal of 724039 is 930427.

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 724039 - 2⁵ = 724007 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 (724079) 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, 1114 + ... + 1639.

It is an arithmetic number, because the mean of its divisors is an integer number (181764).

2⁷²⁴⁰³⁹ is an apocalyptic number.

724039 is a deficient number, since it is larger than the sum of its proper divisors (3017).

724039 is a wasteful number, since it uses less digits than its factorization.

724039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 724039 is about 850.9048125378. The cubic root of 724039 is about 89.7953787534.

The spelling of 724039 in words is "seven hundred twenty-four thousand, thirty-nine".