728025169 has 2 divisors, whose sum is σ = 728025170. Its totient is φ = 728025168.

The previous prime is 728025163. The next prime is 728025227. The reversal of 728025169 is 961520827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727650625 + 374544 = 26975^2 + 612^2 .

It is a cyclic number.

It is not a de Polignac number, because 728025169 - 2³ = 728025161 is a prime.

It is a super-2 number, since 2×728025169² = 1060041293394957122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728025161) 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, 364012584 + 364012585.

It is an arithmetic number, because the mean of its divisors is an integer number (364012585).

Almost surely, 2^728025169 is an apocalyptic number.

It is an amenable number.

728025169 is a deficient number, since it is larger than the sum of its proper divisors (1).

728025169 is an equidigital number, since it uses as much as digits as its factorization.

728025169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 728025169 is about 26981.9415350341. The cubic root of 728025169 is about 899.5986560316.

The spelling of 728025169 in words is "seven hundred twenty-eight million, twenty-five thousand, one hundred sixty-nine".