129199223 has 2 divisors, whose sum is σ = 129199224. Its totient is φ = 129199222.

The previous prime is 129199181. The next prime is 129199237. The reversal of 129199223 is 322991921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129199223 - 2¹⁴ = 129182839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129199243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64599611 + 64599612.

It is an arithmetic number, because the mean of its divisors is an integer number (64599612).

Almost surely, 2^129199223 is an apocalyptic number.

129199223 is a deficient number, since it is larger than the sum of its proper divisors (1).

129199223 is an equidigital number, since it uses as much as digits as its factorization.

129199223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 38.

The square root of 129199223 is about 11366.5836116223. The cubic root of 129199223 is about 505.5374117512.

The spelling of 129199223 in words is "one hundred twenty-nine million, one hundred ninety-nine thousand, two hundred twenty-three".