9864289 has 4 divisors (see below), whose sum is σ = 9871380. Its totient is φ = 9857200.

The previous prime is 9864277. The next prime is 9864331. The reversal of 9864289 is 9824689.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4032064 + 5832225 = 2008^2 + 2415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9864289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9864889) 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, 694 + ... + 4495.

It is an arithmetic number, because the mean of its divisors is an integer number (2467845).

Almost surely, 2^9864289 is an apocalyptic number.

It is an amenable number.

9864289 is a deficient number, since it is larger than the sum of its proper divisors (7091).

9864289 is a wasteful number, since it uses less digits than its factorization.

9864289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7090.

The product of its digits is 248832, while the sum is 46.

The square root of 9864289 is about 3140.7465672989. The cubic root of 9864289 is about 214.4644250332.

It can be divided in two parts, 9864 and 289, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 9864289 in words is "nine million, eight hundred sixty-four thousand, two hundred eighty-nine".