129396311 has 24 divisors (see below), whose sum is σ = 148032192. Its totient is φ = 112939200.

The previous prime is 129396307. The next prime is 129396329. The reversal of 129396311 is 113693921.

It is not a de Polignac number, because 129396311 - 2² = 129396307 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129396301) 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, 346721 + ... + 347093.

It is an arithmetic number, because the mean of its divisors is an integer number (6168008).

Almost surely, 2^129396311 is an apocalyptic number.

129396311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129396311 is a deficient number, since it is larger than the sum of its proper divisors (18635881).

129396311 is a wasteful number, since it uses less digits than its factorization.

129396311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 492 counting only the distinct ones).

The product of its digits is 8748, while the sum is 35.

The square root of 129396311 is about 11375.2499313202. The cubic root of 129396311 is about 505.7943398627.

The spelling of 129396311 in words is "one hundred twenty-nine million, three hundred ninety-six thousand, three hundred eleven".