129681163 has 4 divisors (see below), whose sum is σ = 132697048. Its totient is φ = 126665280.

The previous prime is 129681157. The next prime is 129681197. The reversal of 129681163 is 361186921.

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

It is a cyclic number.

It is not a de Polignac number, because 129681163 - 2⁹ = 129680651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129681133) 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, 1507878 + ... + 1507963.

It is an arithmetic number, because the mean of its divisors is an integer number (33174262).

Almost surely, 2^129681163 is an apocalyptic number.

129681163 is a deficient number, since it is larger than the sum of its proper divisors (3015885).

129681163 is an equidigital number, since it uses as much as digits as its factorization.

129681163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015884.

The product of its digits is 15552, while the sum is 37.

The square root of 129681163 is about 11387.7637400852. The cubic root of 129681163 is about 506.1652183788.

The spelling of 129681163 in words is "one hundred twenty-nine million, six hundred eighty-one thousand, one hundred sixty-three".