128808793 has 2 divisors, whose sum is σ = 128808794. Its totient is φ = 128808792.

The previous prime is 128808787. The next prime is 128808817. The reversal of 128808793 is 397808821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67765824 + 61042969 = 8232^2 + 7813^2 .

It is an emirp because it is prime and its reverse (397808821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128808793 is a prime.

It is not a weakly prime, because it can be changed into another prime (128808293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64404396 + 64404397.

It is an arithmetic number, because the mean of its divisors is an integer number (64404397).

Almost surely, 2^128808793 is an apocalyptic number.

It is an amenable number.

128808793 is a deficient number, since it is larger than the sum of its proper divisors (1).

128808793 is an equidigital number, since it uses as much as digits as its factorization.

128808793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 128808793 is about 11349.3961513377. The cubic root of 128808793 is about 505.0276663600.

The spelling of 128808793 in words is "one hundred twenty-eight million, eight hundred eight thousand, seven hundred ninety-three".