872189 has 2 divisors, whose sum is σ = 872190. Its totient is φ = 872188.

The previous prime is 872177. The next prime is 872203. The reversal of 872189 is 981278.

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., 792100 + 80089 = 890^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 872189 - 2⁴ = 872173 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436094 + 436095.

It is an arithmetic number, because the mean of its divisors is an integer number (436095).

2⁸⁷²¹⁸⁹ is an apocalyptic number.

It is an amenable number.

872189 is a deficient number, since it is larger than the sum of its proper divisors (1).

872189 is an equidigital number, since it uses as much as digits as its factorization.

872189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 872189 is about 933.9105952927. The cubic root of 872189 is about 95.5440254601.

The spelling of 872189 in words is "eight hundred seventy-two thousand, one hundred eighty-nine".