9863221 has 2 divisors, whose sum is σ = 9863222. Its totient is φ = 9863220.

The previous prime is 9863171. The next prime is 9863263. The reversal of 9863221 is 1223689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 184900 = 3111^2 + 430^2 .

It is an emirp because it is prime and its reverse (1223689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9863221 - 2⁷ = 9863093 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9861221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4931610 + 4931611.

It is an arithmetic number, because the mean of its divisors is an integer number (4931611).

Almost surely, 2^9863221 is an apocalyptic number.

It is an amenable number.

9863221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9863221 is an equidigital number, since it uses as much as digits as its factorization.

9863221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 9863221 is about 3140.5765394271. The cubic root of 9863221 is about 214.4566847803.

The spelling of 9863221 in words is "nine million, eight hundred sixty-three thousand, two hundred twenty-one".