8664047 has 4 divisors (see below), whose sum is σ = 9901776. Its totient is φ = 7426320.

The previous prime is 8664043. The next prime is 8664053. The reversal of 8664047 is 7404668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8664047 - 2² = 8664043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8663998 and 8664016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618854 + ... + 618867.

It is an arithmetic number, because the mean of its divisors is an integer number (2475444).

Almost surely, 2^8664047 is an apocalyptic number.

8664047 is a deficient number, since it is larger than the sum of its proper divisors (1237729).

8664047 is a wasteful number, since it uses less digits than its factorization.

8664047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237728.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 8664047 is about 2943.4753268883. The cubic root of 8664047 is about 205.3873066661.

It can be divided in two parts, 866 and 4047, that added together give a cube (4913 = 17³).

The spelling of 8664047 in words is "eight million, six hundred sixty-four thousand, forty-seven".