129944969 has 16 divisors (see below), whose sum is σ = 167598720. Its totient is φ = 97762560.

The previous prime is 129944951. The next prime is 129944977. The reversal of 129944969 is 969449921.

It is a happy number.

It is not a de Polignac number, because 129944969 - 2⁸ = 129944713 is a prime.

It is a super-3 number, since 3×129944969³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129944969.

It is not an unprimeable number, because it can be changed into a prime (129944939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26864 + ... + 31329.

It is an arithmetic number, because the mean of its divisors is an integer number (10474920).

Almost surely, 2^129944969 is an apocalyptic number.

It is an amenable number.

129944969 is a deficient number, since it is larger than the sum of its proper divisors (37653751).

129944969 is a wasteful number, since it uses less digits than its factorization.

129944969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58240.

The product of its digits is 1259712, while the sum is 53.

The square root of 129944969 is about 11399.3407265508. The cubic root of 129944969 is about 506.5082108276.

The spelling of 129944969 in words is "one hundred twenty-nine million, nine hundred forty-four thousand, nine hundred sixty-nine".