984609221 has 2 divisors, whose sum is σ = 984609222. Its totient is φ = 984609220.

The previous prime is 984609209. The next prime is 984609229. The reversal of 984609221 is 122906489.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649536196 + 335073025 = 25486^2 + 18305^2 .

It is a cyclic number.

It is not a de Polignac number, because 984609221 - 2¹⁰ = 984608197 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 (984609229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492304610 + 492304611.

It is an arithmetic number, because the mean of its divisors is an integer number (492304611).

Almost surely, 2^984609221 is an apocalyptic number.

It is an amenable number.

984609221 is a deficient number, since it is larger than the sum of its proper divisors (1).

984609221 is an equidigital number, since it uses as much as digits as its factorization.

984609221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 984609221 is about 31378.4834082210. The cubic root of 984609221 is about 994.8431933900.

The spelling of 984609221 in words is "nine hundred eighty-four million, six hundred nine thousand, two hundred twenty-one".