129916327 has 4 divisors (see below), whose sum is σ = 130422096. Its totient is φ = 129410560.

The previous prime is 129916321. The next prime is 129916333. The reversal of 129916327 is 723619921.

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

It is an interprime number because it is at equal distance from previous prime (129916321) and next prime (129916333).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129916327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129916327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129916321) 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, 252499 + ... + 253012.

It is an arithmetic number, because the mean of its divisors is an integer number (32605524).

Almost surely, 2^129916327 is an apocalyptic number.

129916327 is a deficient number, since it is larger than the sum of its proper divisors (505769).

129916327 is an equidigital number, since it uses as much as digits as its factorization.

129916327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505768.

The product of its digits is 40824, while the sum is 40.

The square root of 129916327 is about 11398.0843565926. The cubic root of 129916327 is about 506.4709938572.

The spelling of 129916327 in words is "one hundred twenty-nine million, nine hundred sixteen thousand, three hundred twenty-seven".