28231287193 has 2 divisors, whose sum is σ = 28231287194. Its totient is φ = 28231287192.

The previous prime is 28231287191. The next prime is 28231287229. The reversal of 28231287193 is 39178213282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27953164864 + 278122329 = 167192^2 + 16677^2 .

It is a cyclic number.

It is not a de Polignac number, because 28231287193 - 2¹ = 28231287191 is a prime.

Together with 28231287191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28231287191) 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, 14115643596 + 14115643597.

It is an arithmetic number, because the mean of its divisors is an integer number (14115643597).

Almost surely, 2^28231287193 is an apocalyptic number.

It is an amenable number.

28231287193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28231287193 is an equidigital number, since it uses as much as digits as its factorization.

28231287193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The spelling of 28231287193 in words is "twenty-eight billion, two hundred thirty-one million, two hundred eighty-seven thousand, one hundred ninety-three".