99500209 has 2 divisors, whose sum is σ = 99500210. Its totient is φ = 99500208.

The previous prime is 99500183. The next prime is 99500213. The reversal of 99500209 is 90200599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58859584 + 40640625 = 7672^2 + 6375^2 .

It is an emirp because it is prime and its reverse (90200599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99500209 - 2²¹ = 97403057 is a prime.

It is not a weakly prime, because it can be changed into another prime (99500299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49750104 + 49750105.

It is an arithmetic number, because the mean of its divisors is an integer number (49750105).

Almost surely, 2^99500209 is an apocalyptic number.

It is an amenable number.

99500209 is a deficient number, since it is larger than the sum of its proper divisors (1).

99500209 is an equidigital number, since it uses as much as digits as its factorization.

99500209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 99500209 is about 9974.9791478479. The cubic root of 99500209 is about 463.3843167448.

The spelling of 99500209 in words is "ninety-nine million, five hundred thousand, two hundred nine".