872189231 has 12 divisors (see below), whose sum is σ = 889221000. Its totient is φ = 855442368.

The previous prime is 872189209. The next prime is 872189249. The reversal of 872189231 is 132981278.

It is not a de Polignac number, because 872189231 - 2²² = 867994927 is a prime.

It is a super-2 number, since 2×872189231² = 1521428109344742722, 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 (872189251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1179860 + ... + 1180598.

It is an arithmetic number, because the mean of its divisors is an integer number (74101750).

Almost surely, 2^872189231 is an apocalyptic number.

872189231 is a deficient number, since it is larger than the sum of its proper divisors (17031769).

872189231 is an equidigital number, since it uses as much as digits as its factorization.

872189231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 977 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 872189231 is about 29532.8500317866. The cubic root of 872189231 is about 955.4403389511.

The spelling of 872189231 in words is "eight hundred seventy-two million, one hundred eighty-nine thousand, two hundred thirty-one".