721624367 has 2 divisors, whose sum is σ = 721624368. Its totient is φ = 721624366.

The previous prime is 721624349. The next prime is 721624391. The reversal of 721624367 is 763426127.

721624367 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 721624367 - 2⁶ = 721624303 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 721624367.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721624307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360812183 + 360812184.

It is an arithmetic number, because the mean of its divisors is an integer number (360812184).

Almost surely, 2^721624367 is an apocalyptic number.

721624367 is a deficient number, since it is larger than the sum of its proper divisors (1).

721624367 is an equidigital number, since it uses as much as digits as its factorization.

721624367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 38.

The square root of 721624367 is about 26863.0669693540. The cubic root of 721624367 is about 896.9544658423.

The spelling of 721624367 in words is "seven hundred twenty-one million, six hundred twenty-four thousand, three hundred sixty-seven".