129091311 has 24 divisors (see below), whose sum is σ = 191873136. Its totient is φ = 83600640.

The previous prime is 129091307. The next prime is 129091349. The reversal of 129091311 is 113190921.

It is not a de Polignac number, because 129091311 - 2² = 129091307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129091511) 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, 44151 + ... + 46983.

It is an arithmetic number, because the mean of its divisors is an integer number (7994714).

Almost surely, 2^129091311 is an apocalyptic number.

129091311 is a deficient number, since it is larger than the sum of its proper divisors (62781825).

129091311 is a wasteful number, since it uses less digits than its factorization.

129091311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983 (or 2980 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 129091311 is about 11361.8357231567. The cubic root of 129091311 is about 505.3966246594.

The spelling of 129091311 in words is "one hundred twenty-nine million, ninety-one thousand, three hundred eleven".