129134644 has 6 divisors (see below), whose sum is σ = 225985634. Its totient is φ = 64567320.

The previous prime is 129134641. The next prime is 129134689. The reversal of 129134644 is 446431921.

It can be written as a sum of positive squares in only one way, i.e., 123432100 + 5702544 = 11110^2 + 2388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129134641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16141827 + ... + 16141834.

Almost surely, 2^129134644 is an apocalyptic number.

It is an amenable number.

129134644 is a deficient number, since it is larger than the sum of its proper divisors (96850990).

129134644 is a wasteful number, since it uses less digits than its factorization.

129134644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32283665 (or 32283663 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 129134644 is about 11363.7425173224. The cubic root of 129134644 is about 505.4531683615.

The spelling of 129134644 in words is "one hundred twenty-nine million, one hundred thirty-four thousand, six hundred forty-four".