83128189 has 2 divisors, whose sum is σ = 83128190. Its totient is φ = 83128188.

The previous prime is 83128169. The next prime is 83128219. The reversal of 83128189 is 98182138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59799289 + 23328900 = 7733^2 + 4830^2 .

It is a cyclic number.

It is not a de Polignac number, because 83128189 - 2⁷ = 83128061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83128139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41564094 + 41564095.

It is an arithmetic number, because the mean of its divisors is an integer number (41564095).

Almost surely, 2^83128189 is an apocalyptic number.

It is an amenable number.

83128189 is a deficient number, since it is larger than the sum of its proper divisors (1).

83128189 is an equidigital number, since it uses as much as digits as its factorization.

83128189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 40.

The square root of 83128189 is about 9117.4661501977. The cubic root of 83128189 is about 436.4315176897.

The spelling of 83128189 in words is "eighty-three million, one hundred twenty-eight thousand, one hundred eighty-nine".