8664143 has 4 divisors (see below), whose sum is σ = 8678760. Its totient is φ = 8649528.

The previous prime is 8664109. The next prime is 8664157. The reversal of 8664143 is 3414668.

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 8664143 - 2¹⁰ = 8663119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664193) 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, 6380 + ... + 7617.

It is an arithmetic number, because the mean of its divisors is an integer number (2169690).

Almost surely, 2^8664143 is an apocalyptic number.

8664143 is a deficient number, since it is larger than the sum of its proper divisors (14617).

8664143 is a wasteful number, since it uses less digits than its factorization.

8664143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14616.

The product of its digits is 13824, while the sum is 32.

The square root of 8664143 is about 2943.4916340972. The cubic root of 8664143 is about 205.3880652458.

The spelling of 8664143 in words is "eight million, six hundred sixty-four thousand, one hundred forty-three".