129491444 has 6 divisors (see below), whose sum is σ = 226610034. Its totient is φ = 64745720.

The previous prime is 129491443. The next prime is 129491459. The reversal of 129491444 is 444194921.

129491444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 99241444 + 30250000 = 9962^2 + 5500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129491398 and 129491407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129491443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16186427 + ... + 16186434.

It is an arithmetic number, because the mean of its divisors is an integer number (37768339).

Almost surely, 2^129491444 is an apocalyptic number.

It is an amenable number.

129491444 is a deficient number, since it is larger than the sum of its proper divisors (97118590).

129491444 is a wasteful number, since it uses less digits than its factorization.

129491444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32372865 (or 32372863 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 129491444 is about 11379.4307414738. The cubic root of 129491444 is about 505.9182639149.

The spelling of 129491444 in words is "one hundred twenty-nine million, four hundred ninety-one thousand, four hundred forty-four".