129953659 has 4 divisors (see below), whose sum is σ = 141767640. Its totient is φ = 118139680.

The previous prime is 129953609. The next prime is 129953683. The reversal of 129953659 is 956359921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129953659 - 2¹¹ = 129951611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129953609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5906974 + ... + 5906995.

It is an arithmetic number, because the mean of its divisors is an integer number (35441910).

Almost surely, 2^129953659 is an apocalyptic number.

129953659 is a deficient number, since it is larger than the sum of its proper divisors (11813981).

129953659 is a wasteful number, since it uses less digits than its factorization.

129953659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11813980.

The product of its digits is 656100, while the sum is 49.

The square root of 129953659 is about 11399.7218825724. The cubic root of 129953659 is about 506.5195013974.

The spelling of 129953659 in words is "one hundred twenty-nine million, nine hundred fifty-three thousand, six hundred fifty-nine".