183721105129 has 9 divisors (see below), whose sum is σ = 186376043991. Its totient is φ = 181103480040.

The previous prime is 183721105049. The next prime is 183721105177. The reversal of 183721105129 is 921501127381.

The square root of 183721105129 is 428627.

It is a perfect power (a square), and thus also a powerful number.

183721105129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 36071505625 + 147649599504 = 189925^2 + 384252^2 .

It is not a de Polignac number, because 183721105129 - 2¹⁵ = 183721072361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 183721105091 and 183721105100.

It is not an unprimeable number, because it can be changed into a prime (183721105189) 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 8 ways as a sum of consecutive naturals, for example, 30429499 + ... + 30435535.

Almost surely, 2^183721105129 is an apocalyptic number.

183721105129 is the 428627-th square number.

183721105129 is the 214314-th centered octagonal number.

It is an amenable number.

183721105129 is a deficient number, since it is larger than the sum of its proper divisors (2654938862).

183721105129 is an frugal number, since it uses more digits than its factorization.

183721105129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12216 (or 6108 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 183721105129 in words is "one hundred eighty-three billion, seven hundred twenty-one million, one hundred five thousand, one hundred twenty-nine".