129018944 has 14 divisors (see below), whose sum is σ = 256022094. Its totient is φ = 64509440.

The previous prime is 129018893. The next prime is 129018947. The reversal of 129018944 is 449810921.

It can be written as a sum of positive squares in only one way, i.e., 100801600 + 28217344 = 10040^2 + 5312^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129018898 and 129018907.

It is not an unprimeable number, because it can be changed into a prime (129018947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007897 + ... + 1008024.

Almost surely, 2^129018944 is an apocalyptic number.

It is an amenable number.

129018944 is a deficient number, since it is larger than the sum of its proper divisors (127003150).

129018944 is an equidigital number, since it uses as much as digits as its factorization.

129018944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015933 (or 2015923 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 129018944 is about 11358.6506240838. The cubic root of 129018944 is about 505.3021672976.

The spelling of 129018944 in words is "one hundred twenty-nine million, eighteen thousand, nine hundred forty-four".