129524009 has 4 divisors (see below), whose sum is σ = 129782016. Its totient is φ = 129266004.

The previous prime is 129523993. The next prime is 129524011. The reversal of 129524009 is 900425921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129524009 - 2⁴ = 129523993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129524039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128249 + ... + 129254.

It is an arithmetic number, because the mean of its divisors is an integer number (32445504).

Almost surely, 2^129524009 is an apocalyptic number.

It is an amenable number.

129524009 is a deficient number, since it is larger than the sum of its proper divisors (258007).

129524009 is an equidigital number, since it uses as much as digits as its factorization.

129524009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258006.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 129524009 is about 11380.8615227495. The cubic root of 129524009 is about 505.9606704422.

It can be divided in two parts, 12952 and 4009, that added together give a palindrome (16961).

The spelling of 129524009 in words is "one hundred twenty-nine million, five hundred twenty-four thousand, nine".