129198863 has 2 divisors, whose sum is σ = 129198864. Its totient is φ = 129198862.

The previous prime is 129198851. The next prime is 129198869. The reversal of 129198863 is 368891921.

It is a strong prime.

It is an emirp because it is prime and its reverse (368891921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129198863 - 2²⁰ = 128150287 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 (129198869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64599431 + 64599432.

It is an arithmetic number, because the mean of its divisors is an integer number (64599432).

Almost surely, 2^129198863 is an apocalyptic number.

129198863 is a deficient number, since it is larger than the sum of its proper divisors (1).

129198863 is an equidigital number, since it uses as much as digits as its factorization.

129198863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 47.

The square root of 129198863 is about 11366.5677757184. The cubic root of 129198863 is about 505.5369422085.

The spelling of 129198863 in words is "one hundred twenty-nine million, one hundred ninety-eight thousand, eight hundred sixty-three".