129106013 has 2 divisors, whose sum is σ = 129106014. Its totient is φ = 129106012.

The previous prime is 129106001. The next prime is 129106027. The reversal of 129106013 is 310601921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128436889 + 669124 = 11333^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 129106013 - 2⁴ = 129105997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129106013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129106213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64553006 + 64553007.

It is an arithmetic number, because the mean of its divisors is an integer number (64553007).

Almost surely, 2^129106013 is an apocalyptic number.

It is an amenable number.

129106013 is a deficient number, since it is larger than the sum of its proper divisors (1).

129106013 is an equidigital number, since it uses as much as digits as its factorization.

129106013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 129106013 is about 11362.4826952563. The cubic root of 129106013 is about 505.4158101983.

Adding to 129106013 its reverse (310601921), we get a palindrome (439707934).

The spelling of 129106013 in words is "one hundred twenty-nine million, one hundred six thousand, thirteen".