724300321 has 2 divisors, whose sum is σ = 724300322. Its totient is φ = 724300320.

The previous prime is 724300319. The next prime is 724300331. The reversal of 724300321 is 123003427.

724300321 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 can be written as a sum of positive squares in only one way, i.e., 672676096 + 51624225 = 25936^2 + 7185^2 .

It is a cyclic number.

It is not a de Polignac number, because 724300321 - 2¹ = 724300319 is a prime.

It is a super-2 number, since 2×724300321² = 1049221910001406082, which contains 22 as substring.

Together with 724300319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 724300292 and 724300301.

It is not a weakly prime, because it can be changed into another prime (724300331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362150160 + 362150161.

It is an arithmetic number, because the mean of its divisors is an integer number (362150161).

Almost surely, 2^724300321 is an apocalyptic number.

It is an amenable number.

724300321 is a deficient number, since it is larger than the sum of its proper divisors (1).

724300321 is an equidigital number, since it uses as much as digits as its factorization.

724300321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 724300321 is about 26912.8281865730. The cubic root of 724300321 is about 898.0618047154.

Adding to 724300321 its reverse (123003427), we get a palindrome (847303748).

The spelling of 724300321 in words is "seven hundred twenty-four million, three hundred thousand, three hundred twenty-one".