129660223 has 24 divisors (see below), whose sum is σ = 171711360. Its totient is φ = 96631920.

The previous prime is 129660217. The next prime is 129660233. The reversal of 129660223 is 322066921.

It is not a de Polignac number, because 129660223 - 2²¹ = 127563071 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 (129660203) 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 23 ways as a sum of consecutive naturals, for example, 7168 + ... + 17626.

It is an arithmetic number, because the mean of its divisors is an integer number (7154640).

Almost surely, 2^129660223 is an apocalyptic number.

129660223 is a deficient number, since it is larger than the sum of its proper divisors (42051137).

129660223 is a wasteful number, since it uses less digits than its factorization.

129660223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10507 (or 10500 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 129660223 is about 11386.8442950626. The cubic root of 129660223 is about 506.1379729152.

The spelling of 129660223 in words is "one hundred twenty-nine million, six hundred sixty thousand, two hundred twenty-three".