129011967 has 32 divisors (see below), whose sum is σ = 219484160. Its totient is φ = 73366560.

The previous prime is 129011947. The next prime is 129011999. The reversal of 129011967 is 769110921.

It is not a de Polignac number, because 129011967 - 2⁶ = 129011903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129011947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40617 + ... + 43677.

It is an arithmetic number, because the mean of its divisors is an integer number (6858880).

Almost surely, 2^129011967 is an apocalyptic number.

129011967 is a deficient number, since it is larger than the sum of its proper divisors (90472193).

129011967 is a wasteful number, since it uses less digits than its factorization.

129011967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300 (or 3294 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 129011967 is about 11358.3434971830. The cubic root of 129011967 is about 505.2930586694.

The spelling of 129011967 in words is "one hundred twenty-nine million, eleven thousand, nine hundred sixty-seven".