6864009 has 4 divisors (see below), whose sum is σ = 9152016. Its totient is φ = 4576004.

The previous prime is 6863993. The next prime is 6864019. The reversal of 6864009 is 9004686.

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.

It is a cyclic number.

It is not a de Polignac number, because 6864009 - 2⁴ = 6863993 is a prime.

It is a super-2 number, since 2×6864009² = 94229239104162, which contains 22 as substring.

It is a D-number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (6864019) 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, 1143999 + ... + 1144004.

It is an arithmetic number, because the mean of its divisors is an integer number (2288004).

Almost surely, 2^6864009 is an apocalyptic number.

It is an amenable number.

6864009 is a deficient number, since it is larger than the sum of its proper divisors (2288007).

6864009 is a wasteful number, since it uses less digits than its factorization.

6864009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288006.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6864009 is about 2619.9253806168. The cubic root of 6864009 is about 190.0462399000.

The spelling of 6864009 in words is "six million, eight hundred sixty-four thousand, nine".