129817136 has 10 divisors (see below), whose sum is σ = 251520732. Its totient is φ = 64908560.

The previous prime is 129817133. The next prime is 129817153. The reversal of 129817136 is 631718921.

It is a self number, because there is not a number n which added to its sum of digits gives 129817136.

It is not an unprimeable number, because it can be changed into a prime (129817133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4056770 + ... + 4056801.

Almost surely, 2^129817136 is an apocalyptic number.

129817136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129817136 is a deficient number, since it is larger than the sum of its proper divisors (121703596).

129817136 is an equidigital number, since it uses as much as digits as its factorization.

129817136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8113579 (or 8113573 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 129817136 is about 11393.7323121091. The cubic root of 129817136 is about 506.3420643215.

The spelling of 129817136 in words is "one hundred twenty-nine million, eight hundred seventeen thousand, one hundred thirty-six".