128711699 has 2 divisors, whose sum is σ = 128711700. Its totient is φ = 128711698.

The previous prime is 128711663. The next prime is 128711707. The reversal of 128711699 is 996117821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128711699 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128711399) 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, 64355849 + 64355850.

It is an arithmetic number, because the mean of its divisors is an integer number (64355850).

Almost surely, 2^128711699 is an apocalyptic number.

128711699 is a deficient number, since it is larger than the sum of its proper divisors (1).

128711699 is an equidigital number, since it uses as much as digits as its factorization.

128711699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 44.

The square root of 128711699 is about 11345.1178486607. The cubic root of 128711699 is about 504.9007405477.

The spelling of 128711699 in words is "one hundred twenty-eight million, seven hundred eleven thousand, six hundred ninety-nine".