129709663 has 4 divisors (see below), whose sum is σ = 134182440. Its totient is φ = 125236888.

The previous prime is 129709633. The next prime is 129709693. The reversal of 129709663 is 366907921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366907921 = 223 ⋅1645327.

It is an interprime number because it is at equal distance from previous prime (129709633) and next prime (129709693).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129709663 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 (129709633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236345 + ... + 2236402.

It is an arithmetic number, because the mean of its divisors is an integer number (33545610).

Almost surely, 2^129709663 is an apocalyptic number.

129709663 is a deficient number, since it is larger than the sum of its proper divisors (4472777).

129709663 is an equidigital number, since it uses as much as digits as its factorization.

129709663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4472776.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 129709663 is about 11389.0150144778. The cubic root of 129709663 is about 506.2022956014.

The spelling of 129709663 in words is "one hundred twenty-nine million, seven hundred nine thousand, six hundred sixty-three".