28735918093 has 2 divisors, whose sum is σ = 28735918094. Its totient is φ = 28735918092.

The previous prime is 28735918039. The next prime is 28735918097. The reversal of 28735918093 is 39081953782.

Together with previous prime (28735918039) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28142411049 + 593507044 = 167757^2 + 24362^2 .

It is a cyclic number.

It is not a de Polignac number, because 28735918093 - 2²⁹ = 28199047181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28735918097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14367959046 + 14367959047.

It is an arithmetic number, because the mean of its divisors is an integer number (14367959047).

Almost surely, 2^28735918093 is an apocalyptic number.

It is an amenable number.

28735918093 is a deficient number, since it is larger than the sum of its proper divisors (1).

28735918093 is an equidigital number, since it uses as much as digits as its factorization.

28735918093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 28735918093 in words is "twenty-eight billion, seven hundred thirty-five million, nine hundred eighteen thousand, ninety-three".