9872689 has 4 divisors (see below), whose sum is σ = 9879040. Its totient is φ = 9866340.

The previous prime is 9872683. The next prime is 9872693. The reversal of 9872689 is 9862789.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9872689 - 2⁵ = 9872657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9872683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904 + ... + 4534.

It is an arithmetic number, because the mean of its divisors is an integer number (2469760).

Almost surely, 2^9872689 is an apocalyptic number.

It is an amenable number.

9872689 is a deficient number, since it is larger than the sum of its proper divisors (6351).

9872689 is a wasteful number, since it uses less digits than its factorization.

9872689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6350.

The product of its digits is 435456, while the sum is 49.

The square root of 9872689 is about 3142.0835444017. The cubic root of 9872689 is about 214.5252839574.

The spelling of 9872689 in words is "nine million, eight hundred seventy-two thousand, six hundred eighty-nine".