724613 has 4 divisors (see below), whose sum is σ = 729120. Its totient is φ = 720108.

The previous prime is 724609. The next prime is 724621. The reversal of 724613 is 316427.

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, and also an emirpimes, since its reverse is a distinct semiprime: 316427 = 109 ⋅2903.

It is a cyclic number.

It is not a de Polignac number, because 724613 - 2² = 724609 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 (724643) 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, 2003 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (182280).

2⁷²⁴⁶¹³ is an apocalyptic number.

It is an amenable number.

724613 is a deficient number, since it is larger than the sum of its proper divisors (4507).

724613 is a wasteful number, since it uses less digits than its factorization.

724613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506.

The product of its digits is 1008, while the sum is 23.

The square root of 724613 is about 851.2420337366. The cubic root of 724613 is about 89.8191016619.

The spelling of 724613 in words is "seven hundred twenty-four thousand, six hundred thirteen".