129304016 has 10 divisors (see below), whose sum is σ = 250526562. Its totient is φ = 64652000.

The previous prime is 129304013. The next prime is 129304027. The reversal of 129304016 is 610403921.

It can be written as a sum of positive squares in only one way, i.e., 114404416 + 14899600 = 10696^2 + 3860^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129304013) 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, 4040735 + ... + 4040766.

Almost surely, 2^129304016 is an apocalyptic number.

129304016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129304016 is a deficient number, since it is larger than the sum of its proper divisors (121222546).

129304016 is an equidigital number, since it uses as much as digits as its factorization.

129304016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081509 (or 8081503 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 129304016 is about 11371.1923737135. The cubic root of 129304016 is about 505.6740546404.

Adding to 129304016 its reverse (610403921), we get a palindrome (739707937).

The spelling of 129304016 in words is "one hundred twenty-nine million, three hundred four thousand, sixteen".