8680821 has 16 divisors (see below), whose sum is σ = 12211584. Its totient is φ = 5474304.

The previous prime is 8680813. The next prime is 8680823. The reversal of 8680821 is 1280868.

8680821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8680821 - 2³ = 8680813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8680823) 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, 6045 + ... + 7341.

It is an arithmetic number, because the mean of its divisors is an integer number (763224).

Almost surely, 2^8680821 is an apocalyptic number.

It is an amenable number.

8680821 is a deficient number, since it is larger than the sum of its proper divisors (3530763).

8680821 is a wasteful number, since it uses less digits than its factorization.

8680821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 8680821 is about 2946.3233020156. The cubic root of 8680821 is about 205.5197676949.

The spelling of 8680821 in words is "eight million, six hundred eighty thousand, eight hundred twenty-one".