8673621 has 16 divisors (see below), whose sum is σ = 13359168. Its totient is φ = 4947200.

The previous prime is 8673611. The next prime is 8673677. The reversal of 8673621 is 1263768.

It is a cyclic number.

It is not a de Polignac number, because 8673621 - 2⁹ = 8673109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

8673621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8673601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7170 + ... + 8291.

It is an arithmetic number, because the mean of its divisors is an integer number (834948).

Almost surely, 2^8673621 is an apocalyptic number.

It is an amenable number.

8673621 is a deficient number, since it is larger than the sum of its proper divisors (4685547).

8673621 is a wasteful number, since it uses less digits than its factorization.

8673621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15492.

The product of its digits is 12096, while the sum is 33.

The square root of 8673621 is about 2945.1011867167. The cubic root of 8673621 is about 205.4629316106.

The spelling of 8673621 in words is "eight million, six hundred seventy-three thousand, six hundred twenty-one".