28817237893 has 2 divisors, whose sum is σ = 28817237894. Its totient is φ = 28817237892.

The previous prime is 28817237807. The next prime is 28817237903. The reversal of 28817237893 is 39873271882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28519778884 + 297459009 = 168878^2 + 17247^2 .

It is a cyclic number.

It is not a de Polignac number, because 28817237893 - 2⁹ = 28817237381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28817237093) 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, 14408618946 + 14408618947.

It is an arithmetic number, because the mean of its divisors is an integer number (14408618947).

Almost surely, 2^28817237893 is an apocalyptic number.

It is an amenable number.

28817237893 is a deficient number, since it is larger than the sum of its proper divisors (1).

28817237893 is an equidigital number, since it uses as much as digits as its factorization.

28817237893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 58.

The spelling of 28817237893 in words is "twenty-eight billion, eight hundred seventeen million, two hundred thirty-seven thousand, eight hundred ninety-three".