129979115 has 12 divisors (see below), whose sum is σ = 181440576. Its totient is φ = 89128368.

The previous prime is 129979081. The next prime is 129979123. The reversal of 129979115 is 511979921.

It is not a de Polignac number, because 129979115 - 2⁶ = 129979051 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265019 + ... + 265508.

It is an arithmetic number, because the mean of its divisors is an integer number (15120048).

Almost surely, 2^129979115 is an apocalyptic number.

129979115 is a deficient number, since it is larger than the sum of its proper divisors (51461461).

129979115 is an equidigital number, since it uses as much as digits as its factorization.

129979115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530546 (or 530539 counting only the distinct ones).

The product of its digits is 51030, while the sum is 44.

The square root of 129979115 is about 11400.8383463673. The cubic root of 129979115 is about 506.5525724647.

The spelling of 129979115 in words is "one hundred twenty-nine million, nine hundred seventy-nine thousand, one hundred fifteen".