129664115 has 8 divisors (see below), whose sum is σ = 177825120. Its totient is φ = 88912512.

The previous prime is 129664109. The next prime is 129664127. The reversal of 129664115 is 511466921.

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 129664115 - 2¹⁸ = 129401971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 3704689 = 129664115 / (1 + 2 + 9 + 6 + 6 + 4 + 1 + 1 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1852310 + ... + 1852379.

It is an arithmetic number, because the mean of its divisors is an integer number (22228140).

Almost surely, 2^129664115 is an apocalyptic number.

129664115 is a deficient number, since it is larger than the sum of its proper divisors (48161005).

129664115 is an equidigital number, since it uses as much as digits as its factorization.

129664115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704701.

The product of its digits is 12960, while the sum is 35.

The square root of 129664115 is about 11387.0151927535. The cubic root of 129664115 is about 506.1430370981.

The spelling of 129664115 in words is "one hundred twenty-nine million, six hundred sixty-four thousand, one hundred fifteen".