129149886 has 8 divisors (see below), whose sum is σ = 258299784. Its totient is φ = 43049960.

The previous prime is 129149873. The next prime is 129149929. The reversal of 129149886 is 688941921.

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

129149886 is an admirable number.

It is a Curzon number.

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, 10762485 + ... + 10762496.

It is an arithmetic number, because the mean of its divisors is an integer number (32287473).

Almost surely, 2^129149886 is an apocalyptic number.

129149886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129149886 is a wasteful number, since it uses less digits than its factorization.

129149886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21524986.

The product of its digits is 248832, while the sum is 48.

The square root of 129149886 is about 11364.4131392694. The cubic root of 129149886 is about 505.4730541021.

The spelling of 129149886 in words is "one hundred twenty-nine million, one hundred forty-nine thousand, eight hundred eighty-six".