98558209 has 2 divisors, whose sum is σ = 98558210. Its totient is φ = 98558208.

The previous prime is 98558203. The next prime is 98558227. The reversal of 98558209 is 90285589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94148209 + 4410000 = 9703^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 98558209 - 2⁵ = 98558177 is a prime.

It is a super-2 number, since 2×98558209² = 19427441122575362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (98558203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49279104 + 49279105.

It is an arithmetic number, because the mean of its divisors is an integer number (49279105).

Almost surely, 2^98558209 is an apocalyptic number.

It is an amenable number.

98558209 is a deficient number, since it is larger than the sum of its proper divisors (1).

98558209 is an equidigital number, since it uses as much as digits as its factorization.

98558209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 46.

The square root of 98558209 is about 9927.6487145749. The cubic root of 98558209 is about 461.9173421459.

The spelling of 98558209 in words is "ninety-eight million, five hundred fifty-eight thousand, two hundred nine".