129881113 has 4 divisors (see below), whose sum is σ = 132901648. Its totient is φ = 126860580.

The previous prime is 129881107. The next prime is 129881117. The reversal of 129881113 is 311188921.

It is a happy number.

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 129881113 - 2¹³ = 129872921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129881117) 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, 1510203 + ... + 1510288.

It is an arithmetic number, because the mean of its divisors is an integer number (33225412).

Almost surely, 2^129881113 is an apocalyptic number.

It is an amenable number.

129881113 is a deficient number, since it is larger than the sum of its proper divisors (3020535).

129881113 is an equidigital number, since it uses as much as digits as its factorization.

129881113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020534.

The product of its digits is 3456, while the sum is 34.

The square root of 129881113 is about 11396.5395186434. The cubic root of 129881113 is about 506.4252298345.

The spelling of 129881113 in words is "one hundred twenty-nine million, eight hundred eighty-one thousand, one hundred thirteen".