129911730 has 32 divisors (see below), whose sum is σ = 335772864. Its totient is φ = 31978176.

The previous prime is 129911723. The next prime is 129911779. The reversal of 129911730 is 37119921.

It is a junction number, because it is equal to n+sod(n) for n = 129911691 and 129911700.

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 15 ways as a sum of consecutive naturals, for example, 166164 + ... + 166943.

It is an arithmetic number, because the mean of its divisors is an integer number (10492902).

Almost surely, 2^129911730 is an apocalyptic number.

129911730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129911730 is an abundant number, since it is smaller than the sum of its proper divisors (205861134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129911730 is a wasteful number, since it uses less digits than its factorization.

129911730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333130.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 129911730 is about 11397.8826981155. The cubic root of 129911730 is about 506.4650200773.

The spelling of 129911730 in words is "one hundred twenty-nine million, nine hundred eleven thousand, seven hundred thirty".