129292009 has 16 divisors (see below), whose sum is σ = 162539136. Its totient is φ = 100739760.

The previous prime is 129292003. The next prime is 129292027. The reversal of 129292009 is 900292921.

It is not a de Polignac number, because 129292009 - 2¹¹ = 129289961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129292003) 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, 2379 + ... + 16255.

It is an arithmetic number, because the mean of its divisors is an integer number (10158696).

Almost surely, 2^129292009 is an apocalyptic number.

It is an amenable number.

129292009 is a deficient number, since it is larger than the sum of its proper divisors (33247127).

129292009 is an equidigital number, since it uses as much as digits as its factorization.

129292009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13917 (or 13895 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 129292009 is about 11370.6644045104. The cubic root of 129292009 is about 505.6584020812.

The spelling of 129292009 in words is "one hundred twenty-nine million, two hundred ninety-two thousand, nine".