728317 has 2 divisors, whose sum is σ = 728318. Its totient is φ = 728316.

The previous prime is 728303. The next prime is 728333. The reversal of 728317 is 713827.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695556 + 32761 = 834^2 + 181^2 .

It is an emirp because it is prime and its reverse (713827) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728317 is a prime.

It is a Chen prime.

728317 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364158 + 364159.

It is an arithmetic number, because the mean of its divisors is an integer number (364159).

2⁷²⁸³¹⁷ is an apocalyptic number.

It is an amenable number.

728317 is a deficient number, since it is larger than the sum of its proper divisors (1).

728317 is an equidigital number, since it uses as much as digits as its factorization.

728317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 28.

The square root of 728317 is about 853.4149049554. The cubic root of 728317 is about 89.9718842217.

The spelling of 728317 in words is "seven hundred twenty-eight thousand, three hundred seventeen".