872189831 has 8 divisors (see below), whose sum is σ = 911639904. Its totient is φ = 832867200.

The previous prime is 872189809. The next prime is 872189839. The reversal of 872189831 is 138981278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872189831 is a prime.

It is a super-2 number, since 2×872189831² = 1521430202599617122, 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 (872189839) 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 7 ways as a sum of consecutive naturals, for example, 17726 + ... + 45371.

It is an arithmetic number, because the mean of its divisors is an integer number (113954988).

Almost surely, 2^872189831 is an apocalyptic number.

872189831 is a deficient number, since it is larger than the sum of its proper divisors (39450073).

872189831 is a wasteful number, since it uses less digits than its factorization.

872189831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63721.

The product of its digits is 193536, while the sum is 47.

The square root of 872189831 is about 29532.8601899647. The cubic root of 872189831 is about 955.4405580412.

The spelling of 872189831 in words is "eight hundred seventy-two million, one hundred eighty-nine thousand, eight hundred thirty-one".