128032173 has 12 divisors (see below), whose sum is σ = 189934108. Its totient is φ = 83047680.

The previous prime is 128032159. The next prime is 128032181. The reversal of 128032173 is 371230821.

It can be written as a sum of positive squares in 2 ways, for example, as 123943689 + 4088484 = 11133^2 + 2022^2 .

It is not a de Polignac number, because 128032173 - 2⁵ = 128032141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128034173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191908 + ... + 192573.

Almost surely, 2^128032173 is an apocalyptic number.

It is an amenable number.

128032173 is a deficient number, since it is larger than the sum of its proper divisors (61901935).

128032173 is a wasteful number, since it uses less digits than its factorization.

128032173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384524 (or 384521 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 128032173 is about 11315.1302688038. The cubic root of 128032173 is about 504.0106408373.

Adding to 128032173 its reverse (371230821), we get a palindrome (499262994).

The spelling of 128032173 in words is "one hundred twenty-eight million, thirty-two thousand, one hundred seventy-three".