129489616 has 20 divisors (see below), whose sum is σ = 251100000. Its totient is φ = 64689632.

The previous prime is 129489599. The next prime is 129489631. The reversal of 129489616 is 616984921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21285 + ... + 26683.

It is an arithmetic number, because the mean of its divisors is an integer number (12555000).

Almost surely, 2^129489616 is an apocalyptic number.

129489616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129489616 is a deficient number, since it is larger than the sum of its proper divisors (121610384).

129489616 is a wasteful number, since it uses less digits than its factorization.

129489616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6906 (or 6900 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 129489616 is about 11379.3504208281. The cubic root of 129489616 is about 505.9158832609.

The spelling of 129489616 in words is "one hundred twenty-nine million, four hundred eighty-nine thousand, six hundred sixteen".