129158399 has 2 divisors, whose sum is σ = 129158400. Its totient is φ = 129158398.

The previous prime is 129158387. The next prime is 129158417. The reversal of 129158399 is 993851921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129158399 - 2¹⁶ = 129092863 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 (129158339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64579199 + 64579200.

It is an arithmetic number, because the mean of its divisors is an integer number (64579200).

Almost surely, 2^129158399 is an apocalyptic number.

129158399 is a deficient number, since it is larger than the sum of its proper divisors (1).

129158399 is an equidigital number, since it uses as much as digits as its factorization.

129158399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 47.

The square root of 129158399 is about 11364.7876794949. The cubic root of 129158399 is about 505.4841600548.

The spelling of 129158399 in words is "one hundred twenty-nine million, one hundred fifty-eight thousand, three hundred ninety-nine".