9223821 has 8 divisors (see below), whose sum is σ = 13664960. Its totient is φ = 6149196.

The previous prime is 9223817. The next prime is 9223847. The reversal of 9223821 is 1283229.

It is a happy number.

It is not a de Polignac number, because 9223821 - 2² = 9223817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 341623 = 9223821 / (9 + 2 + 2 + 3 + 8 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9223321) 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 7 ways as a sum of consecutive naturals, for example, 170785 + ... + 170838.

It is an arithmetic number, because the mean of its divisors is an integer number (1708120).

Almost surely, 2^9223821 is an apocalyptic number.

It is an amenable number.

9223821 is a deficient number, since it is larger than the sum of its proper divisors (4441139).

9223821 is a wasteful number, since it uses less digits than its factorization.

9223821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341632 (or 341626 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 9223821 is about 3037.0744146300. The cubic root of 9223821 is about 209.7186026915.

The spelling of 9223821 in words is "nine million, two hundred twenty-three thousand, eight hundred twenty-one".