128230811 has 2 divisors, whose sum is σ = 128230812. Its totient is φ = 128230810.

The previous prime is 128230769. The next prime is 128230841. The reversal of 128230811 is 118032821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128230811 - 2⁶ = 128230747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128230841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64115405 + 64115406.

It is an arithmetic number, because the mean of its divisors is an integer number (64115406).

Almost surely, 2^128230811 is an apocalyptic number.

128230811 is a deficient number, since it is larger than the sum of its proper divisors (1).

128230811 is an equidigital number, since it uses as much as digits as its factorization.

128230811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 128230811 is about 11323.9044061666. The cubic root of 128230811 is about 504.2711585193.

The spelling of 128230811 in words is "one hundred twenty-eight million, two hundred thirty thousand, eight hundred eleven".