129090717 has 24 divisors (see below), whose sum is σ = 217641216. Its totient is φ = 72194976.

The previous prime is 129090671. The next prime is 129090721. The reversal of 129090717 is 717090921.

It is not a de Polignac number, because 129090717 - 2¹⁰ = 129089693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129090757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18838 + ... + 24759.

It is an arithmetic number, because the mean of its divisors is an integer number (9068384).

Almost surely, 2^129090717 is an apocalyptic number.

It is an amenable number.

129090717 is a deficient number, since it is larger than the sum of its proper divisors (88550499).

129090717 is a wasteful number, since it uses less digits than its factorization.

129090717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43657 (or 43654 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 129090717 is about 11361.8095829846. The cubic root of 129090717 is about 505.3958494818.

The spelling of 129090717 in words is "one hundred twenty-nine million, ninety thousand, seven hundred seventeen".