128392811 has 2 divisors, whose sum is σ = 128392812. Its totient is φ = 128392810.

The previous prime is 128392801. The next prime is 128392813. The reversal of 128392811 is 118293821.

It is a strong prime.

It is an emirp because it is prime and its reverse (118293821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128392811 - 2¹⁴ = 128376427 is a prime.

Together with 128392813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128392813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64196405 + 64196406.

It is an arithmetic number, because the mean of its divisors is an integer number (64196406).

Almost surely, 2^128392811 is an apocalyptic number.

128392811 is a deficient number, since it is larger than the sum of its proper divisors (1).

128392811 is an equidigital number, since it uses as much as digits as its factorization.

128392811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 128392811 is about 11331.0551582807. The cubic root of 128392811 is about 504.4834256269.

The spelling of 128392811 in words is "one hundred twenty-eight million, three hundred ninety-two thousand, eight hundred eleven".