128932017 has 16 divisors (see below), whose sum is σ = 176637120. Its totient is φ = 83607552.

The previous prime is 128932009. The next prime is 128932031. The reversal of 128932017 is 710239821.

It is not a de Polignac number, because 128932017 - 2³ = 128932009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128932217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31209 + ... + 35097.

It is an arithmetic number, because the mean of its divisors is an integer number (11039820).

Almost surely, 2^128932017 is an apocalyptic number.

It is an amenable number.

128932017 is a deficient number, since it is larger than the sum of its proper divisors (47705103).

128932017 is a wasteful number, since it uses less digits than its factorization.

128932017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 128932017 is about 11354.8235124990. The cubic root of 128932017 is about 505.1886587213.

The spelling of 128932017 in words is "one hundred twenty-eight million, nine hundred thirty-two thousand, seventeen".