720548017 has 4 divisors (see below), whose sum is σ = 823483456. Its totient is φ = 617612580.

The previous prime is 720547999. The next prime is 720548021. The reversal of 720548017 is 710845027.

It is a happy number.

720548017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 710845027 = 139 ⋅5113993.

It is a cyclic number.

It is not a de Polignac number, because 720548017 - 2¹⁵ = 720515249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720548047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51467709 + ... + 51467722.

It is an arithmetic number, because the mean of its divisors is an integer number (205870864).

Almost surely, 2^720548017 is an apocalyptic number.

It is an amenable number.

720548017 is a deficient number, since it is larger than the sum of its proper divisors (102935439).

720548017 is a wasteful number, since it uses less digits than its factorization.

720548017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102935438.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 720548017 is about 26843.0254814915. The cubic root of 720548017 is about 896.5082884931.

The spelling of 720548017 in words is "seven hundred twenty million, five hundred forty-eight thousand, seventeen".