728565797 has 2 divisors, whose sum is σ = 728565798. Its totient is φ = 728565796.

The previous prime is 728565793. The next prime is 728565857. The reversal of 728565797 is 797565827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 686911681 + 41654116 = 26209^2 + 6454^2 .

It is an emirp because it is prime and its reverse (797565827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728565797 - 2² = 728565793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728565793) 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, 364282898 + 364282899.

It is an arithmetic number, because the mean of its divisors is an integer number (364282899).

Almost surely, 2^728565797 is an apocalyptic number.

It is an amenable number.

728565797 is a deficient number, since it is larger than the sum of its proper divisors (1).

728565797 is an equidigital number, since it uses as much as digits as its factorization.

728565797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7408800, while the sum is 56.

The square root of 728565797 is about 26991.9580060432. The cubic root of 728565797 is about 899.8212801504.

The spelling of 728565797 in words is "seven hundred twenty-eight million, five hundred sixty-five thousand, seven hundred ninety-seven".