720422717 has 4 divisors (see below), whose sum is σ = 823340256. Its totient is φ = 617505180.

The previous prime is 720422713. The next prime is 720422741. The reversal of 720422717 is 717224027.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 720422717 - 2² = 720422713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720422713) 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 in 3 ways as a sum of consecutive naturals, for example, 51458759 + ... + 51458772.

It is an arithmetic number, because the mean of its divisors is an integer number (205835064).

Almost surely, 2^720422717 is an apocalyptic number.

It is an amenable number.

720422717 is a deficient number, since it is larger than the sum of its proper divisors (102917539).

720422717 is a wasteful number, since it uses less digits than its factorization.

720422717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102917538.

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 720422717 is about 26840.6914404231. The cubic root of 720422717 is about 896.4563192521.

The spelling of 720422717 in words is "seven hundred twenty million, four hundred twenty-two thousand, seven hundred seventeen".