28966912321 has 2 divisors, whose sum is σ = 28966912322. Its totient is φ = 28966912320.

The previous prime is 28966912307. The next prime is 28966912339. The reversal of 28966912321 is 12321966982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28937752321 + 29160000 = 170111^2 + 5400^2 .

It is a cyclic number.

It is not a de Polignac number, because 28966912321 - 2¹⁵ = 28966879553 is a prime.

It is not a weakly prime, because it can be changed into another prime (28966912361) 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, 14483456160 + 14483456161.

It is an arithmetic number, because the mean of its divisors is an integer number (14483456161).

Almost surely, 2^28966912321 is an apocalyptic number.

It is an amenable number.

28966912321 is a deficient number, since it is larger than the sum of its proper divisors (1).

28966912321 is an equidigital number, since it uses as much as digits as its factorization.

28966912321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The spelling of 28966912321 in words is "twenty-eight billion, nine hundred sixty-six million, nine hundred twelve thousand, three hundred twenty-one".