129944269 has 12 divisors (see below), whose sum is σ = 160811616. Its totient is φ = 102812112.

The previous prime is 129944267. The next prime is 129944299. The reversal of 129944269 is 962449921.

It is a happy number.

It is not a de Polignac number, because 129944269 - 2¹ = 129944267 is a prime.

It is a super-2 number, since 2×129944269² = 33771026091888722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129944263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53739 + ... + 56104.

It is an arithmetic number, because the mean of its divisors is an integer number (13400968).

Almost surely, 2^129944269 is an apocalyptic number.

It is an amenable number.

129944269 is a deficient number, since it is larger than the sum of its proper divisors (30867347).

129944269 is a wasteful number, since it uses less digits than its factorization.

129944269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109876 (or 109863 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 129944269 is about 11399.3100229795. The cubic root of 129944269 is about 506.5073013237.

The spelling of 129944269 in words is "one hundred twenty-nine million, nine hundred forty-four thousand, two hundred sixty-nine".