724439039 has 4 divisors (see below), whose sum is σ = 729969240. Its totient is φ = 718908840.

The previous prime is 724439029. The next prime is 724439047. The reversal of 724439039 is 930934427.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-724439039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 724438987 and 724439005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724439029) 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, 2764904 + ... + 2765165.

It is an arithmetic number, because the mean of its divisors is an integer number (182492310).

Almost surely, 2^724439039 is an apocalyptic number.

724439039 is a deficient number, since it is larger than the sum of its proper divisors (5530201).

724439039 is a wasteful number, since it uses less digits than its factorization.

724439039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530200.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 724439039 is about 26915.4052356638. The cubic root of 724439039 is about 898.1191333224.

The spelling of 724439039 in words is "seven hundred twenty-four million, four hundred thirty-nine thousand, thirty-nine".