128859139 has 2 divisors, whose sum is σ = 128859140. Its totient is φ = 128859138.

The previous prime is 128859119. The next prime is 128859169. The reversal of 128859139 is 931958821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128859139 - 2⁷ = 128859011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128859119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64429569 + 64429570.

It is an arithmetic number, because the mean of its divisors is an integer number (64429570).

Almost surely, 2^128859139 is an apocalyptic number.

128859139 is a deficient number, since it is larger than the sum of its proper divisors (1).

128859139 is an equidigital number, since it uses as much as digits as its factorization.

128859139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 46.

The square root of 128859139 is about 11351.6139381147. The cubic root of 128859139 is about 505.0934558928.

The spelling of 128859139 in words is "one hundred twenty-eight million, eight hundred fifty-nine thousand, one hundred thirty-nine".