183821138 has 6 divisors (see below), whose sum is σ = 275760471. Its totient is φ = 91900982.

The previous prime is 183821123. The next prime is 183821171. The reversal of 183821138 is 831128381.

It can be written as a sum of positive squares in only one way, i.e., 91910569 + 91910569 = 9587^2 + 9587^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9587.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 183821098 and 183821107.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14381 + ... + 23967.

Almost surely, 2^183821138 is an apocalyptic number.

183821138 is a deficient number, since it is larger than the sum of its proper divisors (91939333).

183821138 is an frugal number, since it uses more digits than its factorization.

183821138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19176 (or 9589 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 183821138 is about 13558.0654224709. The cubic root of 183821138 is about 568.5890392154.

The spelling of 183821138 in words is "one hundred eighty-three million, eight hundred twenty-one thousand, one hundred thirty-eight".