129312307 has 2 divisors, whose sum is σ = 129312308. Its totient is φ = 129312306.

The previous prime is 129312221. The next prime is 129312317. The reversal of 129312307 is 703213921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129312307 is a prime.

It is not a weakly prime, because it can be changed into another prime (129312317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64656153 + 64656154.

It is an arithmetic number, because the mean of its divisors is an integer number (64656154).

Almost surely, 2^129312307 is an apocalyptic number.

129312307 is a deficient number, since it is larger than the sum of its proper divisors (1).

129312307 is an equidigital number, since it uses as much as digits as its factorization.

129312307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 129312307 is about 11371.5569294622. The cubic root of 129312307 is about 505.6848623841.

The spelling of 129312307 in words is "one hundred twenty-nine million, three hundred twelve thousand, three hundred seven".