129311630 has 16 divisors (see below), whose sum is σ = 266012640. Its totient is φ = 44335392.

The previous prime is 129311629. The next prime is 129311641. The reversal of 129311630 is 36113921.

It is a self number, because there is not a number n which added to its sum of digits gives 129311630.

It is a congruent number.

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, 923585 + ... + 923724.

It is an arithmetic number, because the mean of its divisors is an integer number (16625790).

Almost surely, 2^129311630 is an apocalyptic number.

129311630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129311630 is an abundant number, since it is smaller than the sum of its proper divisors (136701010).

129311630 is a wasteful number, since it uses less digits than its factorization.

129311630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847323.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 129311630 is about 11371.5271621713. The cubic root of 129311630 is about 505.6839798972.

The spelling of 129311630 in words is "one hundred twenty-nine million, three hundred eleven thousand, six hundred thirty".