724444643 has 4 divisors (see below), whose sum is σ = 780171168. Its totient is φ = 668718120.

The previous prime is 724444577. The next prime is 724444649. The reversal of 724444643 is 346444427.

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 724444643 - 2¹⁶ = 724379107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 724444597 and 724444606.

It is not an unprimeable number, because it can be changed into a prime (724444649) 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, 27863243 + ... + 27863268.

It is an arithmetic number, because the mean of its divisors is an integer number (195042792).

Almost surely, 2^724444643 is an apocalyptic number.

724444643 is a deficient number, since it is larger than the sum of its proper divisors (55726525).

724444643 is a wasteful number, since it uses less digits than its factorization.

724444643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55726524.

The product of its digits is 258048, while the sum is 38.

The square root of 724444643 is about 26915.5093394125. The cubic root of 724444643 is about 898.1214491586.

The spelling of 724444643 in words is "seven hundred twenty-four million, four hundred forty-four thousand, six hundred forty-three".