28819077121 has 2 divisors, whose sum is σ = 28819077122. Its totient is φ = 28819077120.

The previous prime is 28819077113. The next prime is 28819077137. The reversal of 28819077121 is 12177091882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18489200625 + 10329876496 = 135975^2 + 101636^2 .

It is a cyclic number.

It is not a de Polignac number, because 28819077121 - 2³ = 28819077113 is a prime.

It is a super-2 number, since 2×28819077121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28819077191) 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, 14409538560 + 14409538561.

It is an arithmetic number, because the mean of its divisors is an integer number (14409538561).

Almost surely, 2^28819077121 is an apocalyptic number.

It is an amenable number.

28819077121 is a deficient number, since it is larger than the sum of its proper divisors (1).

28819077121 is an equidigital number, since it uses as much as digits as its factorization.

28819077121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 46.

The spelling of 28819077121 in words is "twenty-eight billion, eight hundred nineteen million, seventy-seven thousand, one hundred twenty-one".