724070621 has 2 divisors, whose sum is σ = 724070622. Its totient is φ = 724070620.

The previous prime is 724070603. The next prime is 724070651. The reversal of 724070621 is 126070427.

724070621 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., 475850596 + 248220025 = 21814^2 + 15755^2 .

It is a cyclic number.

It is not a de Polignac number, because 724070621 - 2²⁶ = 656961757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724070651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362035310 + 362035311.

It is an arithmetic number, because the mean of its divisors is an integer number (362035311).

Almost surely, 2^724070621 is an apocalyptic number.

It is an amenable number.

724070621 is a deficient number, since it is larger than the sum of its proper divisors (1).

724070621 is an equidigital number, since it uses as much as digits as its factorization.

724070621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 724070621 is about 26908.5603665451. The cubic root of 724070621 is about 897.9668594738.

The spelling of 724070621 in words is "seven hundred twenty-four million, seventy thousand, six hundred twenty-one".