720727117 has 4 divisors (see below), whose sum is σ = 786247776. Its totient is φ = 655206460.

The previous prime is 720727109. The next prime is 720727123. The reversal of 720727117 is 711727027.

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 720727117 - 2³ = 720727109 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 (720727417) 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, 32760313 + ... + 32760334.

It is an arithmetic number, because the mean of its divisors is an integer number (196561944).

Almost surely, 2^720727117 is an apocalyptic number.

It is an amenable number.

720727117 is a deficient number, since it is larger than the sum of its proper divisors (65520659).

720727117 is a wasteful number, since it uses less digits than its factorization.

720727117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65520658.

The product of its (nonzero) digits is 9604, while the sum is 34.

The square root of 720727117 is about 26846.3613363152. The cubic root of 720727117 is about 896.5825612823.

The spelling of 720727117 in words is "seven hundred twenty million, seven hundred twenty-seven thousand, one hundred seventeen".