129681876 has 24 divisors (see below), whose sum is σ = 302982624. Its totient is φ = 43171360.

The previous prime is 129681869. The next prime is 129681887. The reversal of 129681876 is 678186921.

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, 3271 + ... + 16433.

It is an arithmetic number, because the mean of its divisors is an integer number (12624276).

Almost surely, 2^129681876 is an apocalyptic number.

It is an amenable number.

129681876 is an abundant number, since it is smaller than the sum of its proper divisors (173300748).

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

129681876 is a wasteful number, since it uses less digits than its factorization.

129681876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13991 (or 13989 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 129681876 is about 11387.7950455740. The cubic root of 129681876 is about 506.1661460261.

The spelling of 129681876 in words is "one hundred twenty-nine million, six hundred eighty-one thousand, eight hundred seventy-six".