199329209 has 32 divisors (see below), whose sum is σ = 228096000. Its totient is φ = 173323584.

The previous prime is 199329191. The next prime is 199329223. The reversal of 199329209 is 902923991.

199329209 = 2132² + 2133² + ... + 2174².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199329209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199329209.

It is not an unprimeable number, because it can be changed into a prime (199329289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1113482 + ... + 1113660.

It is an arithmetic number, because the mean of its divisors is an integer number (7128000).

Almost surely, 2^199329209 is an apocalyptic number.

199329209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

199329209 is a deficient number, since it is larger than the sum of its proper divisors (28766791).

199329209 is a wasteful number, since it uses less digits than its factorization.

199329209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 199329209 is about 14118.3996614347. The cubic root of 199329209 is about 584.1490137430.

The spelling of 199329209 in words is "one hundred ninety-nine million, three hundred twenty-nine thousand, two hundred nine".