129877138 has 16 divisors (see below), whose sum is σ = 201809880. Its totient is φ = 62613376.

The previous prime is 129877117. The next prime is 129877169. The reversal of 129877138 is 831778921.

It can be written as a sum of positive squares in 4 ways, for example, as 117787609 + 12089529 = 10853^2 + 3477^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68256 + ... + 70132.

Almost surely, 2^129877138 is an apocalyptic number.

129877138 is a deficient number, since it is larger than the sum of its proper divisors (71932742).

129877138 is a wasteful number, since it uses less digits than its factorization.

129877138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101.

The product of its digits is 169344, while the sum is 46.

The square root of 129877138 is about 11396.3651222660. The cubic root of 129877138 is about 506.4200634153.

The spelling of 129877138 in words is "one hundred twenty-nine million, eight hundred seventy-seven thousand, one hundred thirty-eight".