8872643 has 4 divisors (see below), whose sum is σ = 9555168. Its totient is φ = 8190120.

The previous prime is 8872631. The next prime is 8872649. The reversal of 8872643 is 3462788.

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 8872643 - 2⁸ = 8872387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8872597 and 8872606.

It is not an unprimeable number, because it can be changed into a prime (8872649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341243 + ... + 341268.

It is an arithmetic number, because the mean of its divisors is an integer number (2388792).

Almost surely, 2^8872643 is an apocalyptic number.

8872643 is a deficient number, since it is larger than the sum of its proper divisors (682525).

8872643 is a wasteful number, since it uses less digits than its factorization.

8872643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682524.

The product of its digits is 64512, while the sum is 38.

The square root of 8872643 is about 2978.6982055925. The cubic root of 8872643 is about 207.0225573837.

The spelling of 8872643 in words is "eight million, eight hundred seventy-two thousand, six hundred forty-three".