129418331 has 16 divisors (see below), whose sum is σ = 158505984. Its totient is φ = 103138944.

The previous prime is 129418279. The next prime is 129418349. The reversal of 129418331 is 133814921.

It is a cyclic number.

It is not a de Polignac number, because 129418331 - 2¹⁰ = 129417307 is a prime.

It is a super-2 number, since 2×129418331² = 33498208797651122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129418231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3326 + ... + 16428.

It is an arithmetic number, because the mean of its divisors is an integer number (9906624).

Almost surely, 2^129418331 is an apocalyptic number.

129418331 is a deficient number, since it is larger than the sum of its proper divisors (29087653).

129418331 is a wasteful number, since it uses less digits than its factorization.

129418331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13210.

The product of its digits is 5184, while the sum is 32.

The square root of 129418331 is about 11376.2177809675. The cubic root of 129418331 is about 505.8230293968.

The spelling of 129418331 in words is "one hundred twenty-nine million, four hundred eighteen thousand, three hundred thirty-one".