9366821 has 4 divisors (see below), whose sum is σ = 9372972. Its totient is φ = 9360672.

The previous prime is 9366769. The next prime is 9366839. The reversal of 9366821 is 1286639.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1286639 = 101 ⋅12739.

It can be written as a sum of positive squares in 2 ways, for example, as 6076225 + 3290596 = 2465^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 9366821 - 2⁶ = 9366757 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 (9360821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1091 + ... + 4463.

It is an arithmetic number, because the mean of its divisors is an integer number (2343243).

Almost surely, 2^9366821 is an apocalyptic number.

It is an amenable number.

9366821 is a deficient number, since it is larger than the sum of its proper divisors (6151).

9366821 is a wasteful number, since it uses less digits than its factorization.

9366821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6150.

The product of its digits is 15552, while the sum is 35.

The square root of 9366821 is about 3060.5262619360. The cubic root of 9366821 is about 210.7968290555.

The spelling of 9366821 in words is "nine million, three hundred sixty-six thousand, eight hundred twenty-one".