129808141 has 4 divisors (see below), whose sum is σ = 137443932. Its totient is φ = 122172352.

The previous prime is 129808087. The next prime is 129808153. The reversal of 129808141 is 141808921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111915241 + 17892900 = 10579^2 + 4230^2 .

It is a cyclic number.

It is not a de Polignac number, because 129808141 - 2²⁵ = 96253709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129808097 and 129808106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129805141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3817870 + ... + 3817903.

It is an arithmetic number, because the mean of its divisors is an integer number (34360983).

Almost surely, 2^129808141 is an apocalyptic number.

It is an amenable number.

129808141 is a deficient number, since it is larger than the sum of its proper divisors (7635791).

129808141 is an equidigital number, since it uses as much as digits as its factorization.

129808141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635790.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 129808141 is about 11393.3375707033. The cubic root of 129808141 is about 506.3303692756.

The spelling of 129808141 in words is "one hundred twenty-nine million, eight hundred eight thousand, one hundred forty-one".