128825189 has 4 divisors (see below), whose sum is σ = 128852256. Its totient is φ = 128798124.

The previous prime is 128825183. The next prime is 128825227. The reversal of 128825189 is 981528821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128825189 - 2¹² = 128821093 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 (128825183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4289 + ... + 16614.

It is an arithmetic number, because the mean of its divisors is an integer number (32213064).

Almost surely, 2^128825189 is an apocalyptic number.

It is an amenable number.

128825189 is a deficient number, since it is larger than the sum of its proper divisors (27067).

128825189 is an equidigital number, since it uses as much as digits as its factorization.

128825189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27066.

The product of its digits is 92160, while the sum is 44.

The square root of 128825189 is about 11350.1184575316. The cubic root of 128825189 is about 505.0490936816.

The spelling of 128825189 in words is "one hundred twenty-eight million, eight hundred twenty-five thousand, one hundred eighty-nine".