129133568 has 22 divisors (see below), whose sum is σ = 258143076. Its totient is φ = 64566272.

The previous prime is 129133567. The next prime is 129133573. The reversal of 129133568 is 865331921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129133561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62030 + ... + 64077.

Almost surely, 2^129133568 is an apocalyptic number.

It is an amenable number.

129133568 is a deficient number, since it is larger than the sum of its proper divisors (129009508).

129133568 is an equidigital number, since it uses as much as digits as its factorization.

129133568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126127 (or 126109 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 129133568 is about 11363.6951736660. The cubic root of 129133568 is about 505.4517644802.

The spelling of 129133568 in words is "one hundred twenty-nine million, one hundred thirty-three thousand, five hundred sixty-eight".