9680821 has 4 divisors (see below), whose sum is σ = 9863532. Its totient is φ = 9498112.

The previous prime is 9680813. The next prime is 9680843. The reversal of 9680821 is 1280869.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6838225 + 2842596 = 2615^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 9680821 - 2³ = 9680813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9680221) 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, 91276 + ... + 91381.

It is an arithmetic number, because the mean of its divisors is an integer number (2465883).

Almost surely, 2^9680821 is an apocalyptic number.

It is an amenable number.

9680821 is a deficient number, since it is larger than the sum of its proper divisors (182711).

9680821 is a wasteful number, since it uses less digits than its factorization.

9680821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182710.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 9680821 is about 3111.4017741205. The cubic root of 9680821 is about 213.1264723857.

It can be divided in two parts, 9680 and 821, that added together give a palindrome (10501).

The spelling of 9680821 in words is "nine million, six hundred eighty thousand, eight hundred twenty-one".