129638653 has 8 divisors (see below), whose sum is σ = 136904000. Its totient is φ = 122417568.

The previous prime is 129638647. The next prime is 129638681. The reversal of 129638653 is 356836921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129638653 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 (129638623) 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, 4953 + ... + 16846.

It is an arithmetic number, because the mean of its divisors is an integer number (17113000).

Almost surely, 2^129638653 is an apocalyptic number.

It is an amenable number.

129638653 is a deficient number, since it is larger than the sum of its proper divisors (7265347).

129638653 is a wasteful number, since it uses less digits than its factorization.

129638653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22131.

The product of its digits is 233280, while the sum is 43.

The square root of 129638653 is about 11385.8971100217. The cubic root of 129638653 is about 506.1099046784.

The spelling of 129638653 in words is "one hundred twenty-nine million, six hundred thirty-eight thousand, six hundred fifty-three".