129568682 has 4 divisors (see below), whose sum is σ = 194353026. Its totient is φ = 64784340.

The previous prime is 129568643. The next prime is 129568739. The reversal of 129568682 is 286865921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 286865921 = 37 ⋅7753133.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 61324561 = 8261^2 + 7831^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32392169 + ... + 32392172.

Almost surely, 2^129568682 is an apocalyptic number.

129568682 is a deficient number, since it is larger than the sum of its proper divisors (64784344).

129568682 is an equidigital number, since it uses as much as digits as its factorization.

129568682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64784343.

The product of its digits is 414720, while the sum is 47.

The square root of 129568682 is about 11382.8239905570. The cubic root of 129568682 is about 506.0188325881.

The spelling of 129568682 in words is "one hundred twenty-nine million, five hundred sixty-eight thousand, six hundred eighty-two".