9868221 has 12 divisors (see below), whose sum is σ = 15550080. Its totient is φ = 5980680.

The previous prime is 9868217. The next prime is 9868237. The reversal of 9868221 is 1228689.

It is not a de Polignac number, because 9868221 - 2² = 9868217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9868291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49741 + ... + 49938.

It is an arithmetic number, because the mean of its divisors is an integer number (1295840).

Almost surely, 2^9868221 is an apocalyptic number.

It is an amenable number.

9868221 is a deficient number, since it is larger than the sum of its proper divisors (5681859).

9868221 is a wasteful number, since it uses less digits than its factorization.

9868221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99696 (or 99693 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 9868221 is about 3141.3724707522. The cubic root of 9868221 is about 214.4929171052.

The spelling of 9868221 in words is "nine million, eight hundred sixty-eight thousand, two hundred twenty-one".