720574457 has 2 divisors, whose sum is σ = 720574458. Its totient is φ = 720574456.

The previous prime is 720574451. The next prime is 720574469. The reversal of 720574457 is 754475027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 433305856 + 287268601 = 20816^2 + 16949^2 .

It is an emirp because it is prime and its reverse (754475027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720574457 - 2⁴ = 720574441 is a prime.

It is not a weakly prime, because it can be changed into another prime (720574451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360287228 + 360287229.

It is an arithmetic number, because the mean of its divisors is an integer number (360287229).

Almost surely, 2^720574457 is an apocalyptic number.

It is an amenable number.

720574457 is a deficient number, since it is larger than the sum of its proper divisors (1).

720574457 is an equidigital number, since it uses as much as digits as its factorization.

720574457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 274400, while the sum is 41.

The square root of 720574457 is about 26843.5179698936. The cubic root of 720574457 is about 896.5192539382.

The spelling of 720574457 in words is "seven hundred twenty million, five hundred seventy-four thousand, four hundred fifty-seven".