129519968 has 24 divisors (see below), whose sum is σ = 260420832. Its totient is φ = 63381376.

The previous prime is 129519931. The next prime is 129519977. The reversal of 129519968 is 869915921.

It is a super-2 number, since 2×129519968² = 33550844221442048, which contains 22 as substring.

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, 41555 + ... + 44562.

It is an arithmetic number, because the mean of its divisors is an integer number (10850868).

Almost surely, 2^129519968 is an apocalyptic number.

It is an amenable number.

129519968 is an abundant number, since it is smaller than the sum of its proper divisors (130900864).

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

129519968 is an equidigital number, since it uses as much as digits as its factorization.

129519968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86174 (or 86166 counting only the distinct ones).

The product of its digits is 349920, while the sum is 50.

The square root of 129519968 is about 11380.6839864746. The cubic root of 129519968 is about 505.9554085906.

The spelling of 129519968 in words is "one hundred twenty-nine million, five hundred nineteen thousand, nine hundred sixty-eight".