129994679 has 2 divisors, whose sum is σ = 129994680. Its totient is φ = 129994678.

The previous prime is 129994651. The next prime is 129994693. The reversal of 129994679 is 976499921.

129994679 is nontrivially palindromic in base 16.

It is a strong prime.

It is an emirp because it is prime and its reverse (976499921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129994679 - 2²⁴ = 113217463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129994649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64997339 + 64997340.

It is an arithmetic number, because the mean of its divisors is an integer number (64997340).

Almost surely, 2^129994679 is an apocalyptic number.

129994679 is a deficient number, since it is larger than the sum of its proper divisors (1).

129994679 is an equidigital number, since it uses as much as digits as its factorization.

129994679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 56.

The square root of 129994679 is about 11401.5209073176. The cubic root of 129994679 is about 506.5727902502.

The spelling of 129994679 in words is "one hundred twenty-nine million, nine hundred ninety-four thousand, six hundred seventy-nine".