99209 has 8 divisors (see below), whose sum is σ = 112320. Its totient is φ = 86800.

The previous prime is 99191. The next prime is 99223. The reversal of 99209 is 90299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99209 - 2⁸ = 98953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99209.

It is not an unprimeable number, because it can be changed into a prime (99259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164 + ... + 474.

It is an arithmetic number, because the mean of its divisors is an integer number (14040).

2⁹⁹²⁰⁹ is an apocalyptic number.

It is an amenable number.

99209 is a deficient number, since it is larger than the sum of its proper divisors (13111).

99209 is a wasteful number, since it uses less digits than its factorization.

99209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 99209 is about 314.9746021507. The cubic root of 99209 is about 46.2931810012.

The spelling of 99209 in words is "ninety-nine thousand, two hundred nine".