128788879 has 2 divisors, whose sum is σ = 128788880. Its totient is φ = 128788878.

The previous prime is 128788871. The next prime is 128788901. The reversal of 128788879 is 978887821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128788879 - 2³ = 128788871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128788871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64394439 + 64394440.

It is an arithmetic number, because the mean of its divisors is an integer number (64394440).

Almost surely, 2^128788879 is an apocalyptic number.

128788879 is a deficient number, since it is larger than the sum of its proper divisors (1).

128788879 is an equidigital number, since it uses as much as digits as its factorization.

128788879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 58.

The square root of 128788879 is about 11348.5188020287. The cubic root of 128788879 is about 505.0016390497.

The spelling of 128788879 in words is "one hundred twenty-eight million, seven hundred eighty-eight thousand, eight hundred seventy-nine".