9872789 has 8 divisors (see below), whose sum is σ = 10382520. Its totient is φ = 9374400.

The previous prime is 9872749. The next prime is 9872791.

It is a happy number.

9872789 is nontrivially palindromic in base 10.

9872789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 625 + 9872164 = 25^2 + 3142^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 9872789 - 2¹² = 9868693 is a prime.

It is an Ulam number.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (1297815).

Almost surely, 2^9872789 is an apocalyptic number.

It is an amenable number.

9872789 is a deficient number, since it is larger than the sum of its proper divisors (509731).

9872789 is a wasteful number, since it uses less digits than its factorization.

9872789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671.

The product of its digits is 508032, while the sum is 50.

The square root of 9872789 is about 3142.0994573692. The cubic root of 9872789 is about 214.5260082605.

The spelling of 9872789 in words is "nine million, eight hundred seventy-two thousand, seven hundred eighty-nine".