129785336971 has 8 divisors (see below), whose sum is σ = 136802538320. Its totient is φ = 122786775072.

The previous prime is 129785336959. The next prime is 129785336999. The reversal of 129785336971 is 179633587921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 129785336971 - 2⁵ = 129785336939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129785334971) 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, 4645560 + ... + 4673413.

It is an arithmetic number, because the mean of its divisors is an integer number (17100317290).

Almost surely, 2^129785336971 is an apocalyptic number.

129785336971 is a deficient number, since it is larger than the sum of its proper divisors (7017201349).

129785336971 is an equidigital number, since it uses as much as digits as its factorization.

129785336971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9319725.

The product of its digits is 17146080, while the sum is 61.

The spelling of 129785336971 in words is "one hundred twenty-nine billion, seven hundred eighty-five million, three hundred thirty-six thousand, nine hundred seventy-one".