8680639 has 4 divisors (see below), whose sum is σ = 9469800. Its totient is φ = 7891480.

The previous prime is 8680631. The next prime is 8680669. The reversal of 8680639 is 9360868.

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 8680639 - 2³ = 8680631 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8680631) 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, 394564 + ... + 394585.

It is an arithmetic number, because the mean of its divisors is an integer number (2367450).

Almost surely, 2^8680639 is an apocalyptic number.

8680639 is a deficient number, since it is larger than the sum of its proper divisors (789161).

8680639 is a wasteful number, since it uses less digits than its factorization.

8680639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789160.

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

The square root of 8680639 is about 2946.2924159017. The cubic root of 8680639 is about 205.5183313922.

The spelling of 8680639 in words is "eight million, six hundred eighty thousand, six hundred thirty-nine".