129131814 has 16 divisors (see below), whose sum is σ = 295158528. Its totient is φ = 36894792.

The previous prime is 129131803. The next prime is 129131843. The reversal of 129131814 is 418131921.

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, 1537242 + ... + 1537325.

It is an arithmetic number, because the mean of its divisors is an integer number (18447408).

Almost surely, 2^129131814 is an apocalyptic number.

129131814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129131814 is an abundant number, since it is smaller than the sum of its proper divisors (166026714).

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

129131814 is a wasteful number, since it uses less digits than its factorization.

129131814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074579.

The product of its digits is 1728, while the sum is 30.

The square root of 129131814 is about 11363.6179978033. The cubic root of 129131814 is about 505.4494759805.

The spelling of 129131814 in words is "one hundred twenty-nine million, one hundred thirty-one thousand, eight hundred fourteen".