129013968 has 40 divisors (see below), whose sum is σ = 342298528. Its totient is φ = 41841792.

The previous prime is 129013961. The next prime is 129013979. The reversal of 129013968 is 869310921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129013961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34546 + ... + 38097.

Almost surely, 2^129013968 is an apocalyptic number.

It is an amenable number.

129013968 is an abundant number, since it is smaller than the sum of its proper divisors (213284560).

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

129013968 is a wasteful number, since it uses less digits than its factorization.

129013968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72691 (or 72685 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 129013968 is about 11358.4315818690. The cubic root of 129013968 is about 505.2956710529.

The spelling of 129013968 in words is "one hundred twenty-nine million, thirteen thousand, nine hundred sixty-eight".