872870189 has 2 divisors, whose sum is σ = 872870190. Its totient is φ = 872870188.

The previous prime is 872870183. The next prime is 872870209. The reversal of 872870189 is 981078278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696432100 + 176438089 = 26390^2 + 13283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872870189 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 (872870183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436435094 + 436435095.

It is an arithmetic number, because the mean of its divisors is an integer number (436435095).

Almost surely, 2^872870189 is an apocalyptic number.

It is an amenable number.

872870189 is a deficient number, since it is larger than the sum of its proper divisors (1).

872870189 is an equidigital number, since it uses as much as digits as its factorization.

872870189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 50.

The square root of 872870189 is about 29544.3766053711. The cubic root of 872870189 is about 955.6889262496.

The spelling of 872870189 in words is "eight hundred seventy-two million, eight hundred seventy thousand, one hundred eighty-nine".