129616723 has 2 divisors, whose sum is σ = 129616724. Its totient is φ = 129616722.

The previous prime is 129616717. The next prime is 129616757. The reversal of 129616723 is 327616921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129616723 - 2⁵ = 129616691 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (129617723) 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, 64808361 + 64808362.

It is an arithmetic number, because the mean of its divisors is an integer number (64808362).

Almost surely, 2^129616723 is an apocalyptic number.

129616723 is a deficient number, since it is larger than the sum of its proper divisors (1).

129616723 is an equidigital number, since it uses as much as digits as its factorization.

129616723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 129616723 is about 11384.9340358212. The cubic root of 129616723 is about 506.0813647950.

The spelling of 129616723 in words is "one hundred twenty-nine million, six hundred sixteen thousand, seven hundred twenty-three".