129929775 has 12 divisors (see below), whose sum is σ = 214817352. Its totient is φ = 69295840.

The previous prime is 129929753. The next prime is 129929797. The reversal of 129929775 is 577929921.

It is an interprime number because it is at equal distance from previous prime (129929753) and next prime (129929797).

It is not a de Polignac number, because 129929775 - 2⁷ = 129929647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 866124 + ... + 866273.

It is an arithmetic number, because the mean of its divisors is an integer number (17901446).

Almost surely, 2^129929775 is an apocalyptic number.

129929775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129929775 is a deficient number, since it is larger than the sum of its proper divisors (84887577).

129929775 is a wasteful number, since it uses less digits than its factorization.

129929775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732410 (or 1732405 counting only the distinct ones).

The product of its digits is 714420, while the sum is 51.

The square root of 129929775 is about 11398.6742650187. The cubic root of 129929775 is about 506.4884686609.

The spelling of 129929775 in words is "one hundred twenty-nine million, nine hundred twenty-nine thousand, seven hundred seventy-five".