129706518 has 16 divisors (see below), whose sum is σ = 260164800. Its totient is φ = 43110216.

The previous prime is 129706517. The next prime is 129706537. The reversal of 129706518 is 815607921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129706513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29068 + ... + 33231.

It is an arithmetic number, because the mean of its divisors is an integer number (16260300).

Almost surely, 2^129706518 is an apocalyptic number.

129706518 is an abundant number, since it is smaller than the sum of its proper divisors (130458282).

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

129706518 is a wasteful number, since it uses less digits than its factorization.

129706518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62651.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 129706518 is about 11388.8769419992. The cubic root of 129706518 is about 506.1982043640.

The spelling of 129706518 in words is "one hundred twenty-nine million, seven hundred six thousand, five hundred eighteen".