98555209 has 2 divisors, whose sum is σ = 98555210. Its totient is φ = 98555208.

The previous prime is 98555189. The next prime is 98555221. The reversal of 98555209 is 90255589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89870400 + 8684809 = 9480^2 + 2947^2 .

It is a cyclic number.

It is not a de Polignac number, because 98555209 - 2⁷ = 98555081 is a prime.

It is not a weakly prime, because it can be changed into another prime (98555609) 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, 49277604 + 49277605.

It is an arithmetic number, because the mean of its divisors is an integer number (49277605).

Almost surely, 2^98555209 is an apocalyptic number.

It is an amenable number.

98555209 is a deficient number, since it is larger than the sum of its proper divisors (1).

98555209 is an equidigital number, since it uses as much as digits as its factorization.

98555209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 43.

The square root of 98555209 is about 9927.4976202465. The cubic root of 98555209 is about 461.9126553518.

The spelling of 98555209 in words is "ninety-eight million, five hundred fifty-five thousand, two hundred nine".