129085873 has 8 divisors (see below), whose sum is σ = 152614080. Its totient is φ = 106829520.

The previous prime is 129085849. The next prime is 129085907. The reversal of 129085873 is 378580921.

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

It is not a de Polignac number, because 129085873 - 2⁵ = 129085841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129085813) 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, 317743 + ... + 318148.

It is an arithmetic number, because the mean of its divisors is an integer number (19076760).

Almost surely, 2^129085873 is an apocalyptic number.

It is an amenable number.

129085873 is a deficient number, since it is larger than the sum of its proper divisors (23528207).

129085873 is an equidigital number, since it uses as much as digits as its factorization.

129085873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635927.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 129085873 is about 11361.5964107162. The cubic root of 129085873 is about 505.3895279115.

It can be divided in two parts, 12908 and 5873, that added together give a palindrome (18781).

The spelling of 129085873 in words is "one hundred twenty-nine million, eighty-five thousand, eight hundred seventy-three".