128878339 has 2 divisors, whose sum is σ = 128878340. Its totient is φ = 128878338.

The previous prime is 128878313. The next prime is 128878357. The reversal of 128878339 is 933878821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128878339 - 2¹⁵ = 128845571 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128878292 and 128878301.

It is not a weakly prime, because it can be changed into another prime (128878369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64439169 + 64439170.

It is an arithmetic number, because the mean of its divisors is an integer number (64439170).

Almost surely, 2^128878339 is an apocalyptic number.

128878339 is a deficient number, since it is larger than the sum of its proper divisors (1).

128878339 is an equidigital number, since it uses as much as digits as its factorization.

128878339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 128878339 is about 11352.4596013375. The cubic root of 128878339 is about 505.1185409399.

The spelling of 128878339 in words is "one hundred twenty-eight million, eight hundred seventy-eight thousand, three hundred thirty-nine".