128099 has 2 divisors, whose sum is σ = 128100. Its totient is φ = 128098.

The previous prime is 128053. The next prime is 128111. The reversal of 128099 is 990821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128099 - 2⁸ = 127843 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128099.

It is not a weakly prime, because it can be changed into another prime (128399) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64049 + 64050.

It is an arithmetic number, because the mean of its divisors is an integer number (64050).

2¹²⁸⁰⁹⁹ is an apocalyptic number.

128099 is a deficient number, since it is larger than the sum of its proper divisors (1).

128099 is an equidigital number, since it uses as much as digits as its factorization.

128099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 128099 is about 357.9092063638. The cubic root of 128099 is about 50.4098315833.

The spelling of 128099 in words is "one hundred twenty-eight thousand, ninety-nine".