720680423 has 16 divisors (see below), whose sum is σ = 743424000. Its totient is φ = 698416992.

The previous prime is 720680407. The next prime is 720680447. The reversal of 720680423 is 324086027.

It is a cyclic number.

It is not a de Polignac number, because 720680423 - 2⁴ = 720680407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 720680423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720640423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1093268 + ... + 1093926.

It is an arithmetic number, because the mean of its divisors is an integer number (46464000).

Almost surely, 2^720680423 is an apocalyptic number.

720680423 is a deficient number, since it is larger than the sum of its proper divisors (22743577).

720680423 is a wasteful number, since it uses less digits than its factorization.

720680423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 720680423 is about 26845.4916699248. The cubic root of 720680423 is about 896.5631984614.

The spelling of 720680423 in words is "seven hundred twenty million, six hundred eighty thousand, four hundred twenty-three".