129891104 has 48 divisors (see below), whose sum is σ = 293098176. Its totient is φ = 55507200.

The previous prime is 129891103. The next prime is 129891119. The reversal of 129891104 is 401198921.

It is not an unprimeable number, because it can be changed into a prime (129891103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109394 + ... + 110574.

It is an arithmetic number, because the mean of its divisors is an integer number (6106212).

Almost surely, 2^129891104 is an apocalyptic number.

129891104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129891104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146549088).

129891104 is an abundant number, since it is smaller than the sum of its proper divisors (163207072).

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

129891104 is a wasteful number, since it uses less digits than its factorization.

129891104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 129891104 is about 11396.9778450254. The cubic root of 129891104 is about 506.4382149525.

The spelling of 129891104 in words is "one hundred twenty-nine million, eight hundred ninety-one thousand, one hundred four".