28709017 has 2 divisors, whose sum is σ = 28709018. Its totient is φ = 28709016.

The previous prime is 28709011. The next prime is 28709029. The reversal of 28709017 is 71090782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20620681 + 8088336 = 4541^2 + 2844^2 .

It is a cyclic number.

It is not a de Polignac number, because 28709017 - 2¹¹ = 28706969 is a prime.

It is not a weakly prime, because it can be changed into another prime (28709011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14354508 + 14354509.

It is an arithmetic number, because the mean of its divisors is an integer number (14354509).

Almost surely, 2^28709017 is an apocalyptic number.

It is an amenable number.

28709017 is a deficient number, since it is larger than the sum of its proper divisors (1).

28709017 is an equidigital number, since it uses as much as digits as its factorization.

28709017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 28709017 is about 5358.0796000060. The cubic root of 28709017 is about 306.2006494406.

Adding to 28709017 its reverse (71090782), we get a palindrome (99799799).

The spelling of 28709017 in words is "twenty-eight million, seven hundred nine thousand, seventeen".