129130918 has 8 divisors (see below), whose sum is σ = 221367312. Its totient is φ = 55341816.

The previous prime is 129130891. The next prime is 129130927. The reversal of 129130918 is 819031921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4611805 + ... + 4611832.

It is an arithmetic number, because the mean of its divisors is an integer number (27670914).

Almost surely, 2^129130918 is an apocalyptic number.

129130918 is a deficient number, since it is larger than the sum of its proper divisors (92236394).

129130918 is an equidigital number, since it uses as much as digits as its factorization.

129130918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9223646.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 129130918 is about 11363.5785736712. The cubic root of 129130918 is about 505.4483069327.

The spelling of 129130918 in words is "one hundred twenty-nine million, one hundred thirty thousand, nine hundred eighteen".