28849320131 has 2 divisors, whose sum is σ = 28849320132. Its totient is φ = 28849320130.

The previous prime is 28849320113. The next prime is 28849320139. The reversal of 28849320131 is 13102394882.

Together with previous prime (28849320113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28849320131 is a prime.

It is a super-2 number, since 2×28849320131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28849320139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14424660065 + 14424660066.

It is an arithmetic number, because the mean of its divisors is an integer number (14424660066).

Almost surely, 2^28849320131 is an apocalyptic number.

28849320131 is a deficient number, since it is larger than the sum of its proper divisors (1).

28849320131 is an equidigital number, since it uses as much as digits as its factorization.

28849320131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 28849320131 in words is "twenty-eight billion, eight hundred forty-nine million, three hundred twenty thousand, one hundred thirty-one".