8688643 has 8 divisors (see below), whose sum is σ = 9173520. Its totient is φ = 8206560.

The previous prime is 8688629. The next prime is 8688671. The reversal of 8688643 is 3468868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8688643 - 2⁵ = 8688611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8688643.

It is not an unprimeable number, because it can be changed into a prime (8688613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10173 + ... + 10993.

It is an arithmetic number, because the mean of its divisors is an integer number (1146690).

Almost surely, 2^8688643 is an apocalyptic number.

8688643 is a deficient number, since it is larger than the sum of its proper divisors (484877).

8688643 is a wasteful number, since it uses less digits than its factorization.

8688643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397.

The product of its digits is 221184, while the sum is 43.

The square root of 8688643 is about 2947.6504202500. The cubic root of 8688643 is about 205.5814781798.

The spelling of 8688643 in words is "eight million, six hundred eighty-eight thousand, six hundred forty-three".