129223 has 2 divisors, whose sum is σ = 129224. Its totient is φ = 129222.
The previous prime is 129221. The next prime is 129229. The reversal of 129223 is 322921.
It is a happy number.
It is a weak prime.
It is an emirp because it is prime and its reverse (322921) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 129223 - 21 = 129221 is a prime.
Together with 129221, it forms a pair of twin primes.
It is an Ulam number.
It is a zygodrome in base 2.
It is a self number, because there is not a number n which added to its sum of digits gives 129223.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (129221) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64611 + 64612.
It is an arithmetic number, because the mean of its divisors is an integer number (64612).
2129223 is an apocalyptic number.
129223 is a deficient number, since it is larger than the sum of its proper divisors (1).
129223 is an equidigital number, since it uses as much as digits as its factorization.
129223 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 216, while the sum is 19.
The square root of 129223 is about 359.4760075443. The cubic root of 129223 is about 50.5568421808.
The spelling of 129223 in words is "one hundred twenty-nine thousand, two hundred twenty-three".
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