129629999 has 2 divisors, whose sum is σ = 129630000. Its totient is φ = 129629998.

The previous prime is 129629959. The next prime is 129630023. The reversal of 129629999 is 999926921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129629999 - 2²⁰ = 128581423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129629959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64814999 + 64815000.

It is an arithmetic number, because the mean of its divisors is an integer number (64815000).

Almost surely, 2^129629999 is an apocalyptic number.

129629999 is a deficient number, since it is larger than the sum of its proper divisors (1).

129629999 is an equidigital number, since it uses as much as digits as its factorization.

129629999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 56.

The square root of 129629999 is about 11385.5170721404. The cubic root of 129629999 is about 506.0986426757.

The spelling of 129629999 in words is "one hundred twenty-nine million, six hundred twenty-nine thousand, nine hundred ninety-nine".