129616139 has 2 divisors, whose sum is σ = 129616140. Its totient is φ = 129616138.

The previous prime is 129616093. The next prime is 129616141. The reversal of 129616139 is 931616921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129616139 is a prime.

Together with 129616141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129616159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64808069 + 64808070.

It is an arithmetic number, because the mean of its divisors is an integer number (64808070).

Almost surely, 2^129616139 is an apocalyptic number.

129616139 is a deficient number, since it is larger than the sum of its proper divisors (1).

129616139 is an equidigital number, since it uses as much as digits as its factorization.

129616139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 129616139 is about 11384.9083878615. The cubic root of 129616139 is about 506.0806047286.

The spelling of 129616139 in words is "one hundred twenty-nine million, six hundred sixteen thousand, one hundred thirty-nine".