129896399 has 2 divisors, whose sum is σ = 129896400. Its totient is φ = 129896398.

The previous prime is 129896383. The next prime is 129896443. The reversal of 129896399 is 993698921.

It is a weak prime.

It is an emirp because it is prime and its reverse (993698921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129896399 - 2⁴ = 129896383 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 (129896329) 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, 64948199 + 64948200.

It is an arithmetic number, because the mean of its divisors is an integer number (64948200).

Almost surely, 2^129896399 is an apocalyptic number.

129896399 is a deficient number, since it is larger than the sum of its proper divisors (1).

129896399 is an equidigital number, since it uses as much as digits as its factorization.

129896399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 56.

The square root of 129896399 is about 11397.2101410828. The cubic root of 129896399 is about 506.4450964962.

The spelling of 129896399 in words is "one hundred twenty-nine million, eight hundred ninety-six thousand, three hundred ninety-nine".