99984337209 has 9 divisors (see below), whose sum is σ = 144423190639. Its totient is φ = 66655592400.

The previous prime is 99984337207. The next prime is 99984337213. The reversal of 99984337209 is 90273348999.

The square root of 99984337209 is 316203.

It is a perfect power (a square), and thus also a powerful number.

99984337209 is a `hidden beast` number, since 9 + 9 + 98 + 4 + 337 + 209 = 666.

It can be written as a sum of positive squares in only one way, i.e., 229431609 + 99754905600 = 15147^2 + 315840^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 99984337209 - 2¹ = 99984337207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99984337207) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 895909 + ... + 1001309.

Almost surely, 2^99984337209 is an apocalyptic number.

99984337209 is the 316203-rd square number.

99984337209 is the 158102-nd centered octagonal number.

It is an amenable number.

99984337209 is a deficient number, since it is larger than the sum of its proper divisors (44438853430).

99984337209 is an frugal number, since it uses more digits than its factorization.

99984337209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210808 (or 105404 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 63.

The spelling of 99984337209 in words is "ninety-nine billion, nine hundred eighty-four million, three hundred thirty-seven thousand, two hundred nine".