129036671 has 2 divisors, whose sum is σ = 129036672. Its totient is φ = 129036670.

The previous prime is 129036643. The next prime is 129036673. The reversal of 129036671 is 176630921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129036671 is a prime.

Together with 129036673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129036673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64518335 + 64518336.

It is an arithmetic number, because the mean of its divisors is an integer number (64518336).

Almost surely, 2^129036671 is an apocalyptic number.

129036671 is a deficient number, since it is larger than the sum of its proper divisors (1).

129036671 is an equidigital number, since it uses as much as digits as its factorization.

129036671 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 35.

The square root of 129036671 is about 11359.4309276477. The cubic root of 129036671 is about 505.3253088121.

The spelling of 129036671 in words is "one hundred twenty-nine million, thirty-six thousand, six hundred seventy-one".