129044799 has 16 divisors (see below), whose sum is σ = 205884000. Its totient is φ = 79411968.

The previous prime is 129044791. The next prime is 129044899. The reversal of 129044799 is 997440921.

It is a happy number.

It is not a de Polignac number, because 129044799 - 2³ = 129044791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129044791) 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, 183474 + ... + 184175.

It is an arithmetic number, because the mean of its divisors is an integer number (12867750).

Almost surely, 2^129044799 is an apocalyptic number.

129044799 is a deficient number, since it is larger than the sum of its proper divisors (76839201).

129044799 is a wasteful number, since it uses less digits than its factorization.

129044799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367671 (or 367665 counting only the distinct ones).

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

The square root of 129044799 is about 11359.7886864149. The cubic root of 129044799 is about 505.3359187105.

The spelling of 129044799 in words is "one hundred twenty-nine million, forty-four thousand, seven hundred ninety-nine".