8634643 has 4 divisors (see below), whose sum is σ = 8648368. Its totient is φ = 8620920.

The previous prime is 8634629. The next prime is 8634667. The reversal of 8634643 is 3464368.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8634643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8634599 and 8634608.

It is not an unprimeable number, because it can be changed into a prime (8604643) 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, 5871 + ... + 7192.

It is an arithmetic number, because the mean of its divisors is an integer number (2162092).

Almost surely, 2^8634643 is an apocalyptic number.

8634643 is a deficient number, since it is larger than the sum of its proper divisors (13725).

8634643 is a wasteful number, since it uses less digits than its factorization.

8634643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13724.

The product of its digits is 41472, while the sum is 34.

The square root of 8634643 is about 2938.4763058429. The cubic root of 8634643 is about 205.1546958465.

The spelling of 8634643 in words is "eight million, six hundred thirty-four thousand, six hundred forty-three".