720485617 has 2 divisors, whose sum is σ = 720485618. Its totient is φ = 720485616.

The previous prime is 720485611. The next prime is 720485651. The reversal of 720485617 is 716584027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 720170896 + 314721 = 26836^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 720485617 - 2⁷ = 720485489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720485617.

It is not a weakly prime, because it can be changed into another prime (720485611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360242808 + 360242809.

It is an arithmetic number, because the mean of its divisors is an integer number (360242809).

Almost surely, 2^720485617 is an apocalyptic number.

It is an amenable number.

720485617 is a deficient number, since it is larger than the sum of its proper divisors (1).

720485617 is an equidigital number, since it uses as much as digits as its factorization.

720485617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 720485617 is about 26841.8631432321. The cubic root of 720485617 is about 896.4824083154.

The spelling of 720485617 in words is "seven hundred twenty million, four hundred eighty-five thousand, six hundred seventeen".