129605117 has 8 divisors (see below), whose sum is σ = 134007000. Its totient is φ = 125250624.

The previous prime is 129605111. The next prime is 129605167. The reversal of 129605117 is 711506921.

It can be written as a sum of positive squares in 4 ways, for example, as 57592921 + 72012196 = 7589^2 + 8486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129605117 - 2⁴ = 129605101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129605111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6242 + ... + 17267.

It is an arithmetic number, because the mean of its divisors is an integer number (16750875).

Almost surely, 2^129605117 is an apocalyptic number.

It is an amenable number.

129605117 is a deficient number, since it is larger than the sum of its proper divisors (4401883).

129605117 is a wasteful number, since it uses less digits than its factorization.

129605117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23695.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 129605117 is about 11384.4243157043. The cubic root of 129605117 is about 506.0662593479.

The spelling of 129605117 in words is "one hundred twenty-nine million, six hundred five thousand, one hundred seventeen".