98664221 has 2 divisors, whose sum is σ = 98664222. Its totient is φ = 98664220.

The previous prime is 98664199. The next prime is 98664239. The reversal of 98664221 is 12246689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97732996 + 931225 = 9886^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 98664221 - 2⁶ = 98664157 is a prime.

It is a Chen prime.

It is equal to p_5689091 and since 98664221 and 5689091 have the same sum of digits, it is a Honaker 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 (98663221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49332110 + 49332111.

It is an arithmetic number, because the mean of its divisors is an integer number (49332111).

Almost surely, 2^98664221 is an apocalyptic number.

It is an amenable number.

98664221 is a deficient number, since it is larger than the sum of its proper divisors (1).

98664221 is an equidigital number, since it uses as much as digits as its factorization.

98664221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 98664221 is about 9932.9865096053. The cubic root of 98664221 is about 462.0828999242.

The spelling of 98664221 in words is "ninety-eight million, six hundred sixty-four thousand, two hundred twenty-one".