129253323 has 4 divisors (see below), whose sum is σ = 172337768. Its totient is φ = 86168880.

The previous prime is 129253309. The next prime is 129253331. The reversal of 129253323 is 323352921.

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

It is not a de Polignac number, because 129253323 - 2⁶ = 129253259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129258323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21542218 + ... + 21542223.

It is an arithmetic number, because the mean of its divisors is an integer number (43084442).

Almost surely, 2^129253323 is an apocalyptic number.

129253323 is a deficient number, since it is larger than the sum of its proper divisors (43084445).

129253323 is an equidigital number, since it uses as much as digits as its factorization.

129253323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43084444.

The product of its digits is 9720, while the sum is 30.

The square root of 129253323 is about 11368.9631453356. The cubic root of 129253323 is about 505.6079636653.

It can be divided in two parts, 1292 and 53323, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 129253323 in words is "one hundred twenty-nine million, two hundred fifty-three thousand, three hundred twenty-three".