129749306 has 32 divisors (see below), whose sum is σ = 209139840. Its totient is φ = 60250176.

The previous prime is 129749303. The next prime is 129749311. The reversal of 129749306 is 603947921.

It is not an unprimeable number, because it can be changed into a prime (129749303) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 220745 + ... + 221331.

It is an arithmetic number, because the mean of its divisors is an integer number (6535620).

Almost surely, 2^129749306 is an apocalyptic number.

129749306 is a deficient number, since it is larger than the sum of its proper divisors (79390534).

129749306 is a wasteful number, since it uses less digits than its factorization.

129749306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 129749306 is about 11390.7552866349. The cubic root of 129749306 is about 506.2538603374.

The spelling of 129749306 in words is "one hundred twenty-nine million, seven hundred forty-nine thousand, three hundred six".