129306737 has 12 divisors (see below), whose sum is σ = 155606580. Its totient is φ = 107011296.

The previous prime is 129306733. The next prime is 129306739. The reversal of 129306737 is 737603921.

It can be written as a sum of positive squares in 2 ways, for example, as 28826161 + 100480576 = 5369^2 + 10024^2 .

It is not a de Polignac number, because 129306737 - 2² = 129306733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129306737.

It is not an unprimeable number, because it can be changed into a prime (129306733) 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 in 11 ways as a sum of consecutive naturals, for example, 44078 + ... + 46919.

It is an arithmetic number, because the mean of its divisors is an integer number (12967215).

Almost surely, 2^129306737 is an apocalyptic number.

It is an amenable number.

129306737 is a deficient number, since it is larger than the sum of its proper divisors (26299843).

129306737 is an equidigital number, since it uses as much as digits as its factorization.

129306737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91040 (or 91033 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 129306737 is about 11371.3120175290. The cubic root of 129306737 is about 505.6776016544.

The spelling of 129306737 in words is "one hundred twenty-nine million, three hundred six thousand, seven hundred thirty-seven".