129168223 has 2 divisors, whose sum is σ = 129168224. Its totient is φ = 129168222.

The previous prime is 129168211. The next prime is 129168229. The reversal of 129168223 is 322861921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129168223 - 2⁵ = 129168191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129168229) 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, 64584111 + 64584112.

It is an arithmetic number, because the mean of its divisors is an integer number (64584112).

Almost surely, 2^129168223 is an apocalyptic number.

129168223 is a deficient number, since it is larger than the sum of its proper divisors (1).

129168223 is an equidigital number, since it uses as much as digits as its factorization.

129168223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 129168223 is about 11365.2198834866. The cubic root of 129168223 is about 505.4969757150.

The spelling of 129168223 in words is "one hundred twenty-nine million, one hundred sixty-eight thousand, two hundred twenty-three".