129917136 has 40 divisors (see below), whose sum is σ = 353285920. Its totient is φ = 41026176.

The previous prime is 129917119. The next prime is 129917141. The reversal of 129917136 is 631719921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129917094 and 129917103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70315 + ... + 72138.

It is an arithmetic number, because the mean of its divisors is an integer number (8832148).

Almost surely, 2^129917136 is an apocalyptic number.

129917136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129917136 is an abundant number, since it is smaller than the sum of its proper divisors (223368784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129917136 is a wasteful number, since it uses less digits than its factorization.

129917136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142483 (or 142477 counting only the distinct ones).

The product of its digits is 20412, while the sum is 39.

The square root of 129917136 is about 11398.1198449569. The cubic root of 129917136 is about 506.4720451343.

The spelling of 129917136 in words is "one hundred twenty-nine million, nine hundred seventeen thousand, one hundred thirty-six".