129544869 has 16 divisors (see below), whose sum is σ = 182059200. Its totient is φ = 81709056.

The previous prime is 129544861. The next prime is 129544889. The reversal of 129544869 is 968445921.

It is not a de Polignac number, because 129544869 - 2³ = 129544861 is a prime.

It is a super-2 number, since 2×129544869² = 33563746168454322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129544861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79507 + ... + 81119.

It is an arithmetic number, because the mean of its divisors is an integer number (11378700).

Almost surely, 2^129544869 is an apocalyptic number.

129544869 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

129544869 is a deficient number, since it is larger than the sum of its proper divisors (52514331).

129544869 is a wasteful number, since it uses less digits than its factorization.

129544869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044.

The product of its digits is 622080, while the sum is 48.

The square root of 129544869 is about 11381.7779366846. Note that the first 3 decimals coincide. The cubic root of 129544869 is about 505.9878308457.

It can be divided in two parts, 1295 and 44869, that added together give a palindrome (46164).

The spelling of 129544869 in words is "one hundred twenty-nine million, five hundred forty-four thousand, eight hundred sixty-nine".