724643 has 2 divisors, whose sum is σ = 724644. Its totient is φ = 724642.

The previous prime is 724639. The next prime is 724651. The reversal of 724643 is 346427.

It is a happy number.

724643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 724643 - 2² = 724639 is a prime.

It is not a weakly prime, because it can be changed into another prime (729643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362321 + 362322.

It is an arithmetic number, because the mean of its divisors is an integer number (362322).

2⁷²⁴⁶⁴³ is an apocalyptic number.

724643 is a deficient number, since it is larger than the sum of its proper divisors (1).

724643 is an equidigital number, since it uses as much as digits as its factorization.

724643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 26.

The square root of 724643 is about 851.2596548645. The cubic root of 724643 is about 89.8203411906.

The spelling of 724643 in words is "seven hundred twenty-four thousand, six hundred forty-three".