129924279 has 24 divisors (see below), whose sum is σ = 194699232. Its totient is φ = 83419200.

The previous prime is 129924271. The next prime is 129924281. The reversal of 129924279 is 972429921.

It is not a de Polignac number, because 129924279 - 2³ = 129924271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129924271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31702 + ... + 35564.

It is an arithmetic number, because the mean of its divisors is an integer number (8112468).

Almost surely, 2^129924279 is an apocalyptic number.

129924279 is a deficient number, since it is larger than the sum of its proper divisors (64774953).

129924279 is a wasteful number, since it uses less digits than its factorization.

129924279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007 (or 4004 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 129924279 is about 11398.4331818018. The cubic root of 129924279 is about 506.4813271111.

It can be divided in two parts, 12992 and 4279, that added together give a palindrome (17271).

The spelling of 129924279 in words is "one hundred twenty-nine million, nine hundred twenty-four thousand, two hundred seventy-nine".