9864409 has 4 divisors (see below), whose sum is σ = 9872820. Its totient is φ = 9856000.

The previous prime is 9864397. The next prime is 9864427. The reversal of 9864409 is 9044689.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9044689 = 2777 ⋅3257.

It can be written as a sum of positive squares in 2 ways, for example, as 1570009 + 8294400 = 1253^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 9864409 - 2¹¹ = 9862361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9864509) 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, 2092 + ... + 4909.

It is an arithmetic number, because the mean of its divisors is an integer number (2468205).

Almost surely, 2^9864409 is an apocalyptic number.

It is an amenable number.

9864409 is a deficient number, since it is larger than the sum of its proper divisors (8411).

9864409 is a wasteful number, since it uses less digits than its factorization.

9864409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8410.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 9864409 is about 3140.7656709790. The cubic root of 9864409 is about 214.4652946896.

The spelling of 9864409 in words is "nine million, eight hundred sixty-four thousand, four hundred nine".