98764442221 has 2 divisors, whose sum is σ = 98764442222. Its totient is φ = 98764442220.

The previous prime is 98764442177. The next prime is 98764442239. The reversal of 98764442221 is 12224446789.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57276455625 + 41487986596 = 239325^2 + 203686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98764442221 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 (98764442261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49382221110 + 49382221111.

It is an arithmetic number, because the mean of its divisors is an integer number (49382221111).

Almost surely, 2^98764442221 is an apocalyptic number.

It is an amenable number.

98764442221 is a deficient number, since it is larger than the sum of its proper divisors (1).

98764442221 is an equidigital number, since it uses as much as digits as its factorization.

98764442221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 49.

The spelling of 98764442221 in words is "ninety-eight billion, seven hundred sixty-four million, four hundred forty-two thousand, two hundred twenty-one".