28161017 has 2 divisors, whose sum is σ = 28161018. Its totient is φ = 28161016.

The previous prime is 28160999. The next prime is 28161031. The reversal of 28161017 is 71016182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20647936 + 7513081 = 4544^2 + 2741^2 .

It is a cyclic number.

It is not a de Polignac number, because 28161017 - 2¹⁰ = 28159993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28161317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14080508 + 14080509.

It is an arithmetic number, because the mean of its divisors is an integer number (14080509).

Almost surely, 2^28161017 is an apocalyptic number.

It is an amenable number.

28161017 is a deficient number, since it is larger than the sum of its proper divisors (1).

28161017 is an equidigital number, since it uses as much as digits as its factorization.

28161017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 28161017 is about 5306.6954877777. The cubic root of 28161017 is about 304.2398593193.

Adding to 28161017 its reverse (71016182), we get a palindrome (99177199).

The spelling of 28161017 in words is "twenty-eight million, one hundred sixty-one thousand, seventeen".