8949221 has 2 divisors, whose sum is σ = 8949222. Its totient is φ = 8949220.

The previous prime is 8949181. The next prime is 8949253. The reversal of 8949221 is 1229498.

8949221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8850625 + 98596 = 2975^2 + 314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8949221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8945221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4474610 + 4474611.

It is an arithmetic number, because the mean of its divisors is an integer number (4474611).

Almost surely, 2^8949221 is an apocalyptic number.

It is an amenable number.

8949221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8949221 is an equidigital number, since it uses as much as digits as its factorization.

8949221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 8949221 is about 2991.5248620060. The cubic root of 8949221 is about 207.6164421200.

The spelling of 8949221 in words is "eight million, nine hundred forty-nine thousand, two hundred twenty-one".