129471223 has 4 divisors (see below), whose sum is σ = 147967120. Its totient is φ = 110975328.

The previous prime is 129471217. The next prime is 129471233. The reversal of 129471223 is 322174921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129471223 - 2⁹ = 129470711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129471233) 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 in 3 ways as a sum of consecutive naturals, for example, 9247938 + ... + 9247951.

It is an arithmetic number, because the mean of its divisors is an integer number (36991780).

Almost surely, 2^129471223 is an apocalyptic number.

129471223 is a deficient number, since it is larger than the sum of its proper divisors (18495897).

129471223 is an equidigital number, since it uses as much as digits as its factorization.

129471223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18495896.

The product of its digits is 6048, while the sum is 31.

The square root of 129471223 is about 11378.5422177008. The cubic root of 129471223 is about 505.8919283119.

The spelling of 129471223 in words is "one hundred twenty-nine million, four hundred seventy-one thousand, two hundred twenty-three".