128804171 has 2 divisors, whose sum is σ = 128804172. Its totient is φ = 128804170.

The previous prime is 128804149. The next prime is 128804177. The reversal of 128804171 is 171408821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128804171 - 2²⁶ = 61695307 is a prime.

It is not a weakly prime, because it can be changed into another prime (128804177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64402085 + 64402086.

It is an arithmetic number, because the mean of its divisors is an integer number (64402086).

Almost surely, 2^128804171 is an apocalyptic number.

128804171 is a deficient number, since it is larger than the sum of its proper divisors (1).

128804171 is an equidigital number, since it uses as much as digits as its factorization.

128804171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 128804171 is about 11349.1925263430. The cubic root of 128804171 is about 505.0216257118.

The spelling of 128804171 in words is "one hundred twenty-eight million, eight hundred four thousand, one hundred seventy-one".