28918355093 has 2 divisors, whose sum is σ = 28918355094. Its totient is φ = 28918355092.

The previous prime is 28918355083. The next prime is 28918355113. The reversal of 28918355093 is 39055381982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28649624644 + 268730449 = 169262^2 + 16393^2 .

It is a cyclic number.

It is not a de Polignac number, because 28918355093 - 2⁶ = 28918355029 is a prime.

It is a super-2 number, since 2×28918355093² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28918355083) 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, 14459177546 + 14459177547.

It is an arithmetic number, because the mean of its divisors is an integer number (14459177547).

Almost surely, 2^28918355093 is an apocalyptic number.

It is an amenable number.

28918355093 is a deficient number, since it is larger than the sum of its proper divisors (1).

28918355093 is an equidigital number, since it uses as much as digits as its factorization.

28918355093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 28918355093 in words is "twenty-eight billion, nine hundred eighteen million, three hundred fifty-five thousand, ninety-three".