720681703 has 16 divisors (see below), whose sum is σ = 829463040. Its totient is φ = 613375776.

The previous prime is 720681679. The next prime is 720681719. The reversal of 720681703 is 307186027.

It is a cyclic number.

It is not a de Polignac number, because 720681703 - 2²⁹ = 183810791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720681733) 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, 858558 + ... + 859396.

It is an arithmetic number, because the mean of its divisors is an integer number (51841440).

Almost surely, 2^720681703 is an apocalyptic number.

720681703 is a deficient number, since it is larger than the sum of its proper divisors (108781337).

720681703 is a wasteful number, since it uses less digits than its factorization.

720681703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 720681703 is about 26845.5155100438. The cubic root of 720681703 is about 896.5637292562.

The spelling of 720681703 in words is "seven hundred twenty million, six hundred eighty-one thousand, seven hundred three".