129661593 has 8 divisors (see below), whose sum is σ = 173153568. Its totient is φ = 86305344.

The previous prime is 129661591. The next prime is 129661607. The reversal of 129661593 is 395166921.

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

It is not a de Polignac number, because 129661593 - 2¹ = 129661591 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129661591) 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, 31680 + ... + 35537.

It is an arithmetic number, because the mean of its divisors is an integer number (21644196).

Almost surely, 2^129661593 is an apocalyptic number.

It is an amenable number.

129661593 is a deficient number, since it is larger than the sum of its proper divisors (43491975).

129661593 is an equidigital number, since it uses as much as digits as its factorization.

129661593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67863.

The product of its digits is 87480, while the sum is 42.

The square root of 129661593 is about 11386.9044520449. The cubic root of 129661593 is about 506.1397555400.

The spelling of 129661593 in words is "one hundred twenty-nine million, six hundred sixty-one thousand, five hundred ninety-three".