98912221 has 2 divisors, whose sum is σ = 98912222. Its totient is φ = 98912220.

The previous prime is 98912207. The next prime is 98912249. The reversal of 98912221 is 12221989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95355225 + 3556996 = 9765^2 + 1886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98912221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98912251) 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, 49456110 + 49456111.

It is an arithmetic number, because the mean of its divisors is an integer number (49456111).

Almost surely, 2^98912221 is an apocalyptic number.

It is an amenable number.

98912221 is a deficient number, since it is larger than the sum of its proper divisors (1).

98912221 is an equidigital number, since it uses as much as digits as its factorization.

98912221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 98912221 is about 9945.4623321392. The cubic root of 98912221 is about 462.4697361254.

The spelling of 98912221 in words is "ninety-eight million, nine hundred twelve thousand, two hundred twenty-one".