129670689 has 8 divisors (see below), whose sum is σ = 175728832. Its totient is φ = 85029840.

The previous prime is 129670669. The next prime is 129670691. The reversal of 129670689 is 986076921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129670689 - 2²⁰ = 128622113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129670609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354109 + ... + 354474.

It is an arithmetic number, because the mean of its divisors is an integer number (21966104).

Almost surely, 2^129670689 is an apocalyptic number.

It is an amenable number.

129670689 is a deficient number, since it is larger than the sum of its proper divisors (46058143).

129670689 is an equidigital number, since it uses as much as digits as its factorization.

129670689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708647.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 129670689 is about 11387.3038512196. The cubic root of 129670689 is about 506.1515908091.

The spelling of 129670689 in words is "one hundred twenty-nine million, six hundred seventy thousand, six hundred eighty-nine".