9676821 has 32 divisors (see below), whose sum is σ = 16247808. Its totient is φ = 4976640.

The previous prime is 9676811. The next prime is 9676829. The reversal of 9676821 is 1286769.

It is not a de Polignac number, because 9676821 - 2¹⁰ = 9675797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9676821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9676829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37525 + ... + 37781.

It is an arithmetic number, because the mean of its divisors is an integer number (507744).

Almost surely, 2^9676821 is an apocalyptic number.

It is an amenable number.

9676821 is a deficient number, since it is larger than the sum of its proper divisors (6570987).

9676821 is a wasteful number, since it uses less digits than its factorization.

9676821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its digits is 36288, while the sum is 39.

The square root of 9676821 is about 3110.7589106197. The cubic root of 9676821 is about 213.0971145681.

The spelling of 9676821 in words is "nine million, six hundred seventy-six thousand, eight hundred twenty-one".