129982209 has 16 divisors (see below), whose sum is σ = 199922688. Its totient is φ = 73580112.

The previous prime is 129982207. The next prime is 129982241. The reversal of 129982209 is 902289921.

It is a happy number.

It is not a de Polignac number, because 129982209 - 2¹ = 129982207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129982207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26677 + ... + 31170.

It is an arithmetic number, because the mean of its divisors is an integer number (12495168).

Almost surely, 2^129982209 is an apocalyptic number.

It is an amenable number.

129982209 is a deficient number, since it is larger than the sum of its proper divisors (69940479).

129982209 is a wasteful number, since it uses less digits than its factorization.

129982209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57964.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 129982209 is about 11400.9740373356. The cubic root of 129982209 is about 506.5565917290.

The spelling of 129982209 in words is "one hundred twenty-nine million, nine hundred eighty-two thousand, two hundred nine".