720516073 has 2 divisors, whose sum is σ = 720516074. Its totient is φ = 720516072.

The previous prime is 720516067. The next prime is 720516149. The reversal of 720516073 is 370615027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455054224 + 265461849 = 21332^2 + 16293^2 .

It is a cyclic number.

It is not a de Polignac number, because 720516073 - 2¹³ = 720507881 is a prime.

It is a super-2 number, since 2×720516073² = 1038286822902682658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (720519073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360258036 + 360258037.

It is an arithmetic number, because the mean of its divisors is an integer number (360258037).

Almost surely, 2^720516073 is an apocalyptic number.

It is an amenable number.

720516073 is a deficient number, since it is larger than the sum of its proper divisors (1).

720516073 is an equidigital number, since it uses as much as digits as its factorization.

720516073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 720516073 is about 26842.4304600012. The cubic root of 720516073 is about 896.4950400195.

The spelling of 720516073 in words is "seven hundred twenty million, five hundred sixteen thousand, seventy-three".