129312911 has 24 divisors (see below), whose sum is σ = 165798864. Its totient is φ = 99912960.

The previous prime is 129312907. The next prime is 129312947. The reversal of 129312911 is 119213921.

It is not a de Polignac number, because 129312911 - 2² = 129312907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129312961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25031 + ... + 29751.

It is an arithmetic number, because the mean of its divisors is an integer number (6908286).

Almost surely, 2^129312911 is an apocalyptic number.

129312911 is a deficient number, since it is larger than the sum of its proper divisors (36485953).

129312911 is a wasteful number, since it uses less digits than its factorization.

129312911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791 (or 4784 counting only the distinct ones).

The product of its digits is 972, while the sum is 29.

The square root of 129312911 is about 11371.5834869204. The cubic root of 129312911 is about 505.6856497110.

The spelling of 129312911 in words is "one hundred twenty-nine million, three hundred twelve thousand, nine hundred eleven".