129841968 has 20 divisors (see below), whose sum is σ = 335425208. Its totient is φ = 43280640.

The previous prime is 129841939. The next prime is 129841993. The reversal of 129841968 is 869148921.

It is a super-2 number, since 2×129841968² = 33717873308226048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 2705041 = 129841968 / (1 + 2 + 9 + 8 + 4 + 1 + 9 + 6 + 8).

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, 1352473 + ... + 1352568.

Almost surely, 2^129841968 is an apocalyptic number.

It is an amenable number.

129841968 is an abundant number, since it is smaller than the sum of its proper divisors (205583240).

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

129841968 is a wasteful number, since it uses less digits than its factorization.

129841968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705052 (or 2705046 counting only the distinct ones).

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

The square root of 129841968 is about 11394.8219819355. The cubic root of 129841968 is about 506.3743473849.

The spelling of 129841968 in words is "one hundred twenty-nine million, eight hundred forty-one thousand, nine hundred sixty-eight".