129438682 has 4 divisors (see below), whose sum is σ = 194158026. Its totient is φ = 64719340.

The previous prime is 129438679. The next prime is 129438689. The reversal of 129438682 is 286834921.

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

It can be written as a sum of positive squares in only one way, i.e., 115756081 + 13682601 = 10759^2 + 3699^2 .

It is not an unprimeable number, because it can be changed into a prime (129438689) 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 as a sum of consecutive naturals, namely, 32359669 + ... + 32359672.

Almost surely, 2^129438682 is an apocalyptic number.

129438682 is a deficient number, since it is larger than the sum of its proper divisors (64719344).

129438682 is an equidigital number, since it uses as much as digits as its factorization.

129438682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64719343.

The product of its digits is 165888, while the sum is 43.

The square root of 129438682 is about 11377.1121994995. The cubic root of 129438682 is about 505.8495415219.

The spelling of 129438682 in words is "one hundred twenty-nine million, four hundred thirty-eight thousand, six hundred eighty-two".