728027917 has 2 divisors, whose sum is σ = 728027918. Its totient is φ = 728027916.

The previous prime is 728027903. The next prime is 728027953. The reversal of 728027917 is 719720827.

It is a happy number.

728027917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405861316 + 322166601 = 20146^2 + 17949^2 .

It is a cyclic number.

It is not a de Polignac number, because 728027917 - 2²³ = 719639309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728027957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364013958 + 364013959.

It is an arithmetic number, because the mean of its divisors is an integer number (364013959).

Almost surely, 2^728027917 is an apocalyptic number.

It is an amenable number.

728027917 is a deficient number, since it is larger than the sum of its proper divisors (1).

728027917 is an equidigital number, since it uses as much as digits as its factorization.

728027917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 728027917 is about 26981.9924579339. The cubic root of 728027917 is about 899.5997879036.

The spelling of 728027917 in words is "seven hundred twenty-eight million, twenty-seven thousand, nine hundred seventeen".