128933171 has 2 divisors, whose sum is σ = 128933172. Its totient is φ = 128933170.

The previous prime is 128933137. The next prime is 128933191. The reversal of 128933171 is 171339821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128933171 - 2¹⁰ = 128932147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128933191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64466585 + 64466586.

It is an arithmetic number, because the mean of its divisors is an integer number (64466586).

Almost surely, 2^128933171 is an apocalyptic number.

128933171 is a deficient number, since it is larger than the sum of its proper divisors (1).

128933171 is an equidigital number, since it uses as much as digits as its factorization.

128933171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 128933171 is about 11354.8743277942. The cubic root of 128933171 is about 505.1901659394.

The spelling of 128933171 in words is "one hundred twenty-eight million, nine hundred thirty-three thousand, one hundred seventy-one".