129088492809 has 4 divisors (see below), whose sum is σ = 172117990416. Its totient is φ = 86058995204.

The previous prime is 129088492777. The next prime is 129088492847. The reversal of 129088492809 is 908294880921.

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 129088492809 - 2⁵ = 129088492777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129088492849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21514748799 + ... + 21514748804.

It is an arithmetic number, because the mean of its divisors is an integer number (43029497604).

Almost surely, 2^129088492809 is an apocalyptic number.

It is an amenable number.

129088492809 is a deficient number, since it is larger than the sum of its proper divisors (43029497607).

129088492809 is an equidigital number, since it uses as much as digits as its factorization.

129088492809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43029497606.

The product of its (nonzero) digits is 5971968, while the sum is 60.

The spelling of 129088492809 in words is "one hundred twenty-nine billion, eighty-eight million, four hundred ninety-two thousand, eight hundred nine".