129725707 has 2 divisors, whose sum is σ = 129725708. Its totient is φ = 129725706.

The previous prime is 129725693. The next prime is 129725747. The reversal of 129725707 is 707527921.

It is a happy number.

It is an a-pointer prime, because the next prime (129725747) can be obtained adding 129725707 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129725707 - 2⁷ = 129725579 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129725707.

It is not a weakly prime, because it can be changed into another prime (129725747) 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, 64862853 + 64862854.

It is an arithmetic number, because the mean of its divisors is an integer number (64862854).

Almost surely, 2^129725707 is an apocalyptic number.

129725707 is a deficient number, since it is larger than the sum of its proper divisors (1).

129725707 is an equidigital number, since it uses as much as digits as its factorization.

129725707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 129725707 is about 11389.7193556294. The cubic root of 129725707 is about 506.2231657371.

The spelling of 129725707 in words is "one hundred twenty-nine million, seven hundred twenty-five thousand, seven hundred seven".