28703665129 has 2 divisors, whose sum is σ = 28703665130. Its totient is φ = 28703665128.

The previous prime is 28703665033. The next prime is 28703665139. The reversal of 28703665129 is 92156630782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15997190400 + 12706474729 = 126480^2 + 112723^2 .

It is a cyclic number.

It is not a de Polignac number, because 28703665129 - 2⁹ = 28703664617 is a prime.

It is not a weakly prime, because it can be changed into another prime (28703665139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14351832564 + 14351832565.

It is an arithmetic number, because the mean of its divisors is an integer number (14351832565).

Almost surely, 2^28703665129 is an apocalyptic number.

It is an amenable number.

28703665129 is a deficient number, since it is larger than the sum of its proper divisors (1).

28703665129 is an equidigital number, since it uses as much as digits as its factorization.

28703665129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 28703665129 in words is "twenty-eight billion, seven hundred three million, six hundred sixty-five thousand, one hundred twenty-nine".