129616491 has 8 divisors (see below), whose sum is σ = 176841280. Its totient is φ = 84401352.

The previous prime is 129616489. The next prime is 129616507. The reversal of 129616491 is 194616921.

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

It is not a de Polignac number, because 129616491 - 2¹ = 129616489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129616691) 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 7 ways as a sum of consecutive naturals, for example, 502261 + ... + 502518.

It is an arithmetic number, because the mean of its divisors is an integer number (22105160).

Almost surely, 2^129616491 is an apocalyptic number.

129616491 is a deficient number, since it is larger than the sum of its proper divisors (47224789).

129616491 is a wasteful number, since it uses less digits than its factorization.

129616491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004825.

The product of its digits is 23328, while the sum is 39.

The square root of 129616491 is about 11384.9238469126. The cubic root of 129616491 is about 506.0810628511.

The spelling of 129616491 in words is "one hundred twenty-nine million, six hundred sixteen thousand, four hundred ninety-one".