728578715723 has 2 divisors, whose sum is σ = 728578715724. Its totient is φ = 728578715722.

The previous prime is 728578715719. The next prime is 728578715737. The reversal of 728578715723 is 327517875827.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728578715723 - 2² = 728578715719 is a prime.

It is not a weakly prime, because it can be changed into another prime (728578715773) 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 as a sum of consecutive naturals, namely, 364289357861 + 364289357862.

It is an arithmetic number, because the mean of its divisors is an integer number (364289357862).

Almost surely, 2^728578715723 is an apocalyptic number.

728578715723 is a deficient number, since it is larger than the sum of its proper divisors (1).

728578715723 is an equidigital number, since it uses as much as digits as its factorization.

728578715723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46099200, while the sum is 62.

The spelling of 728578715723 in words is "seven hundred twenty-eight billion, five hundred seventy-eight million, seven hundred fifteen thousand, seven hundred twenty-three".