129169444 has 6 divisors (see below), whose sum is σ = 226046534. Its totient is φ = 64584720.

The previous prime is 129169433. The next prime is 129169499. The reversal of 129169444 is 444961921.

It can be written as a sum of positive squares in only one way, i.e., 86266944 + 42902500 = 9288^2 + 6550^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129169397 and 129169406.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16146177 + ... + 16146184.

Almost surely, 2^129169444 is an apocalyptic number.

It is an amenable number.

129169444 is a deficient number, since it is larger than the sum of its proper divisors (96877090).

129169444 is a wasteful number, since it uses less digits than its factorization.

129169444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32292365 (or 32292363 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 129169444 is about 11365.2735998743. The cubic root of 129169444 is about 505.4985684955.

The spelling of 129169444 in words is "one hundred twenty-nine million, one hundred sixty-nine thousand, four hundred forty-four".