129518113 has 4 divisors (see below), whose sum is σ = 129755440. Its totient is φ = 129280788.

The previous prime is 129518111. The next prime is 129518131. The reversal of 129518113 is 311815921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129518113 - 2¹ = 129518111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129518111) 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, 117843 + ... + 118936.

It is an arithmetic number, because the mean of its divisors is an integer number (32438860).

Almost surely, 2^129518113 is an apocalyptic number.

It is an amenable number.

129518113 is a deficient number, since it is larger than the sum of its proper divisors (237327).

129518113 is an equidigital number, since it uses as much as digits as its factorization.

129518113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237326.

The product of its digits is 2160, while the sum is 31.

The square root of 129518113 is about 11380.6024884450. The cubic root of 129518113 is about 505.9529931284.

The spelling of 129518113 in words is "one hundred twenty-nine million, five hundred eighteen thousand, one hundred thirteen".