129828429 has 24 divisors (see below), whose sum is σ = 195167232. Its totient is φ = 83098080.

The previous prime is 129828421. The next prime is 129828431. The reversal of 129828429 is 924828921.

It is a happy number.

It is not a de Polignac number, because 129828429 - 2³ = 129828421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129828421) 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, 19524 + ... + 25314.

It is an arithmetic number, because the mean of its divisors is an integer number (8131968).

Almost surely, 2^129828429 is an apocalyptic number.

It is an amenable number.

129828429 is a deficient number, since it is larger than the sum of its proper divisors (65338803).

129828429 is a wasteful number, since it uses less digits than its factorization.

129828429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897 (or 5894 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 129828429 is about 11394.2278808176. The cubic root of 129828429 is about 506.3567463974.

The spelling of 129828429 in words is "one hundred twenty-nine million, eight hundred twenty-eight thousand, four hundred twenty-nine".