724009 has 16 divisors (see below), whose sum is σ = 874944. Its totient is φ = 590400.

The previous prime is 724007. The next prime is 724021. The reversal of 724009 is 900427.

It is a cyclic number.

It is not a de Polignac number, because 724009 - 2¹ = 724007 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (724001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8682 + ... + 8764.

It is an arithmetic number, because the mean of its divisors is an integer number (54684).

2⁷²⁴⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

724009 is a deficient number, since it is larger than the sum of its proper divisors (150935).

724009 is a wasteful number, since it uses less digits than its factorization.

724009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 724009 is about 850.8871840614. The cubic root of 724009 is about 89.7941385354.

The spelling of 724009 in words is "seven hundred twenty-four thousand, nine".