8673921 has 12 divisors (see below), whose sum is σ = 13074048. Its totient is φ = 5531064.

The previous prime is 8673913. The next prime is 8673923. The reversal of 8673921 is 1293768.

It is not a de Polignac number, because 8673921 - 2³ = 8673913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8673923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20745 + ... + 21158.

It is an arithmetic number, because the mean of its divisors is an integer number (1089504).

Almost surely, 2^8673921 is an apocalyptic number.

It is an amenable number.

8673921 is a deficient number, since it is larger than the sum of its proper divisors (4400127).

8673921 is a wasteful number, since it uses less digits than its factorization.

8673921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41932 (or 41929 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 8673921 is about 2945.1521183124. The cubic root of 8673921 is about 205.4653004086.

The spelling of 8673921 in words is "eight million, six hundred seventy-three thousand, nine hundred twenty-one".