129371311 has 4 divisors (see below), whose sum is σ = 129412192. Its totient is φ = 129330432.

The previous prime is 129371299. The next prime is 129371317. The reversal of 129371311 is 113173921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129371311 - 2⁷ = 129371183 is a prime.

It is a super-2 number, since 2×129371311² = 33473872219717442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129371311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129371317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15255 + ... + 22168.

It is an arithmetic number, because the mean of its divisors is an integer number (32353048).

Almost surely, 2^129371311 is an apocalyptic number.

129371311 is a deficient number, since it is larger than the sum of its proper divisors (40881).

129371311 is an equidigital number, since it uses as much as digits as its factorization.

129371311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40880.

The product of its digits is 1134, while the sum is 28.

The square root of 129371311 is about 11374.1510012836. The cubic root of 129371311 is about 505.7617637847.

The spelling of 129371311 in words is "one hundred twenty-nine million, three hundred seventy-one thousand, three hundred eleven".