720722507 has 2 divisors, whose sum is σ = 720722508. Its totient is φ = 720722506.

The previous prime is 720722467. The next prime is 720722533. The reversal of 720722507 is 705227027.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720722507 is a prime.

It is not a weakly prime, because it can be changed into another prime (720722537) 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, 360361253 + 360361254.

It is an arithmetic number, because the mean of its divisors is an integer number (360361254).

Almost surely, 2^720722507 is an apocalyptic number.

720722507 is a deficient number, since it is larger than the sum of its proper divisors (1).

720722507 is an equidigital number, since it uses as much as digits as its factorization.

720722507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 720722507 is about 26846.2754772426. The cubic root of 720722507 is about 896.5806496691.

The spelling of 720722507 in words is "seven hundred twenty million, seven hundred twenty-two thousand, five hundred seven".