872636189 has 4 divisors (see below), whose sum is σ = 882441180. Its totient is φ = 862831200.

The previous prime is 872636179. The next prime is 872636203. The reversal of 872636189 is 981636278.

872636189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83868964 + 788767225 = 9158^2 + 28085^2 .

It is a cyclic number.

It is not a de Polignac number, because 872636189 - 2⁴ = 872636173 is a prime.

It is a super-2 number, since 2×872636189² = 1522987836704887442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872636119) 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, 4902362 + ... + 4902539.

It is an arithmetic number, because the mean of its divisors is an integer number (220610295).

Almost surely, 2^872636189 is an apocalyptic number.

872636189 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

872636189 is a deficient number, since it is larger than the sum of its proper divisors (9804991).

872636189 is an equidigital number, since it uses as much as digits as its factorization.

872636189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9804990.

The product of its digits is 870912, while the sum is 50.

The square root of 872636189 is about 29540.4161954432. The cubic root of 872636189 is about 955.6035179044.

The spelling of 872636189 in words is "eight hundred seventy-two million, six hundred thirty-six thousand, one hundred eighty-nine".