129026971 has 2 divisors, whose sum is σ = 129026972. Its totient is φ = 129026970.

The previous prime is 129026939. The next prime is 129026977. The reversal of 129026971 is 179620921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129026971 - 2⁵ = 129026939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129026971.

It is not a weakly prime, because it can be changed into another prime (129026977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64513485 + 64513486.

It is an arithmetic number, because the mean of its divisors is an integer number (64513486).

Almost surely, 2^129026971 is an apocalyptic number.

129026971 is a deficient number, since it is larger than the sum of its proper divisors (1).

129026971 is an equidigital number, since it uses as much as digits as its factorization.

129026971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 129026971 is about 11359.0039616156. The cubic root of 129026971 is about 505.3126463179.

The spelling of 129026971 in words is "one hundred twenty-nine million, twenty-six thousand, nine hundred seventy-one".