129508653 has 16 divisors (see below), whose sum is σ = 180449280. Its totient is φ = 82464624.

The previous prime is 129508651. The next prime is 129508661. The reversal of 129508653 is 356805921.

It is not a de Polignac number, because 129508653 - 2¹ = 129508651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129508651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90300 + ... + 91722.

It is an arithmetic number, because the mean of its divisors is an integer number (11278080).

Almost surely, 2^129508653 is an apocalyptic number.

It is an amenable number.

129508653 is a deficient number, since it is larger than the sum of its proper divisors (50940627).

129508653 is a wasteful number, since it uses less digits than its factorization.

129508653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 129508653 is about 11380.1868613833. The cubic root of 129508653 is about 505.9406745635.

The spelling of 129508653 in words is "one hundred twenty-nine million, five hundred eight thousand, six hundred fifty-three".