129273707 has 2 divisors, whose sum is σ = 129273708. Its totient is φ = 129273706.

The previous prime is 129273691. The next prime is 129273713. The reversal of 129273707 is 707372921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129273707 - 2⁴ = 129273691 is a prime.

It is not a weakly prime, because it can be changed into another prime (129273737) 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, 64636853 + 64636854.

It is an arithmetic number, because the mean of its divisors is an integer number (64636854).

Almost surely, 2^129273707 is an apocalyptic number.

129273707 is a deficient number, since it is larger than the sum of its proper divisors (1).

129273707 is an equidigital number, since it uses as much as digits as its factorization.

129273707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 129273707 is about 11369.8595857645. The cubic root of 129273707 is about 505.6345413727.

The spelling of 129273707 in words is "one hundred twenty-nine million, two hundred seventy-three thousand, seven hundred seven".