28083521393 has 2 divisors, whose sum is σ = 28083521394. Its totient is φ = 28083521392.

The previous prime is 28083521353. The next prime is 28083521413. The reversal of 28083521393 is 39312538082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18493824064 + 9589697329 = 135992^2 + 97927^2 .

It is a cyclic number.

It is not a de Polignac number, because 28083521393 - 2⁶ = 28083521329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28083521353) 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, 14041760696 + 14041760697.

It is an arithmetic number, because the mean of its divisors is an integer number (14041760697).

Almost surely, 2^28083521393 is an apocalyptic number.

It is an amenable number.

28083521393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28083521393 is an equidigital number, since it uses as much as digits as its factorization.

28083521393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 28083521393 in words is "twenty-eight billion, eighty-three million, five hundred twenty-one thousand, three hundred ninety-three".