720717881 has 8 divisors (see below), whose sum is σ = 792672384. Its totient is φ = 651122640.

The previous prime is 720717871. The next prime is 720717887. The reversal of 720717881 is 188717027.

720717881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720717881 - 2¹⁴ = 720701497 is a prime.

It is a super-2 number, since 2×720717881² = 1038868527986260322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720717887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589175 + ... + 590396.

It is an arithmetic number, because the mean of its divisors is an integer number (99084048).

Almost surely, 2^720717881 is an apocalyptic number.

It is an amenable number.

720717881 is a deficient number, since it is larger than the sum of its proper divisors (71954503).

720717881 is a wasteful number, since it uses less digits than its factorization.

720717881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179631.

The product of its (nonzero) digits is 43904, while the sum is 41.

The square root of 720717881 is about 26846.1893199016. The cubic root of 720717881 is about 896.5787314130.

The spelling of 720717881 in words is "seven hundred twenty million, seven hundred seventeen thousand, eight hundred eighty-one".