183621161 has 2 divisors, whose sum is σ = 183621162. Its totient is φ = 183621160.

The previous prime is 183621143. The next prime is 183621211. The reversal of 183621161 is 161126381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128029225 + 55591936 = 11315^2 + 7456^2 .

It is a cyclic number.

It is not a de Polignac number, because 183621161 - 2¹⁰ = 183620137 is a prime.

It is not a weakly prime, because it can be changed into another prime (183621101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91810580 + 91810581.

It is an arithmetic number, because the mean of its divisors is an integer number (91810581).

Almost surely, 2^183621161 is an apocalyptic number.

It is an amenable number.

183621161 is a deficient number, since it is larger than the sum of its proper divisors (1).

183621161 is an equidigital number, since it uses as much as digits as its factorization.

183621161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 183621161 is about 13550.6885802899. The cubic root of 183621161 is about 568.3827771406.

The spelling of 183621161 in words is "one hundred eighty-three million, six hundred twenty-one thousand, one hundred sixty-one".