728735317 has 2 divisors, whose sum is σ = 728735318. Its totient is φ = 728735316.

The previous prime is 728735303. The next prime is 728735327. The reversal of 728735317 is 713537827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 626300676 + 102434641 = 25026^2 + 10121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728735317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728735327) 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, 364367658 + 364367659.

It is an arithmetic number, because the mean of its divisors is an integer number (364367659).

Almost surely, 2^728735317 is an apocalyptic number.

It is an amenable number.

728735317 is a deficient number, since it is larger than the sum of its proper divisors (1).

728735317 is an equidigital number, since it uses as much as digits as its factorization.

728735317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 43.

The square root of 728735317 is about 26995.0980179736. The cubic root of 728735317 is about 899.8910637696.

The spelling of 728735317 in words is "seven hundred twenty-eight million, seven hundred thirty-five thousand, three hundred seventeen".