129653959 has 4 divisors (see below), whose sum is σ = 129678616. Its totient is φ = 129629304.

The previous prime is 129653947. The next prime is 129653969. The reversal of 129653959 is 959356921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129653959 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 (129653939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924 + ... + 16129.

It is an arithmetic number, because the mean of its divisors is an integer number (32419654).

Almost surely, 2^129653959 is an apocalyptic number.

129653959 is a deficient number, since it is larger than the sum of its proper divisors (24657).

129653959 is an equidigital number, since it uses as much as digits as its factorization.

129653959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24656.

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

The square root of 129653959 is about 11386.5692374833. The cubic root of 129653959 is about 506.1298221263.

It can be divided in two parts, 1296 and 53959, that added together give a palindrome (55255).

The spelling of 129653959 in words is "one hundred twenty-nine million, six hundred fifty-three thousand, nine hundred fifty-nine".