128299879 has 2 divisors, whose sum is σ = 128299880. Its totient is φ = 128299878.

The previous prime is 128299817. The next prime is 128299883. The reversal of 128299879 is 978992821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128299879 - 2⁷ = 128299751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128299889) 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, 64149939 + 64149940.

It is an arithmetic number, because the mean of its divisors is an integer number (64149940).

Almost surely, 2^128299879 is an apocalyptic number.

128299879 is a deficient number, since it is larger than the sum of its proper divisors (1).

128299879 is an equidigital number, since it uses as much as digits as its factorization.

128299879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 55.

The square root of 128299879 is about 11326.9536504746. The cubic root of 128299879 is about 504.3616795331.

The spelling of 128299879 in words is "one hundred twenty-eight million, two hundred ninety-nine thousand, eight hundred seventy-nine".