129543223 has 2 divisors, whose sum is σ = 129543224. Its totient is φ = 129543222.

The previous prime is 129543217. The next prime is 129543241. The reversal of 129543223 is 322345921.

It is a weak prime.

It is an emirp because it is prime and its reverse (322345921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129543223 - 2⁵ = 129543191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129543283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64771611 + 64771612.

It is an arithmetic number, because the mean of its divisors is an integer number (64771612).

Almost surely, 2^129543223 is an apocalyptic number.

129543223 is a deficient number, since it is larger than the sum of its proper divisors (1).

129543223 is an equidigital number, since it uses as much as digits as its factorization.

129543223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 129543223 is about 11381.7056278925. The cubic root of 129543223 is about 505.9856878057.

The spelling of 129543223 in words is "one hundred twenty-nine million, five hundred forty-three thousand, two hundred twenty-three".