129104823 has 8 divisors (see below), whose sum is σ = 173454336. Its totient is φ = 85412600.

The previous prime is 129104761. The next prime is 129104879. The reversal of 129104823 is 328401921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129104823 - 2²⁶ = 61995959 is a prime.

It is a super-2 number, since 2×129104823² = 33336110643722658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129104123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163863 + ... + 164648.

It is an arithmetic number, because the mean of its divisors is an integer number (21681792).

Almost surely, 2^129104823 is an apocalyptic number.

129104823 is a deficient number, since it is larger than the sum of its proper divisors (44349513).

129104823 is a wasteful number, since it uses less digits than its factorization.

129104823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328645.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 129104823 is about 11362.4303298194. The cubic root of 129104823 is about 505.4142573487.

The spelling of 129104823 in words is "one hundred twenty-nine million, one hundred four thousand, eight hundred twenty-three".