183138481 has 2 divisors, whose sum is σ = 183138482. Its totient is φ = 183138480.

The previous prime is 183138469. The next prime is 183138497. The reversal of 183138481 is 184831381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168584256 + 14554225 = 12984^2 + 3815^2 .

It is a cyclic number.

It is not a de Polignac number, because 183138481 - 2¹¹ = 183136433 is a prime.

It is a super-2 number, since 2×183138481² = 67079406445974722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 183138481.

It is not a weakly prime, because it can be changed into another prime (183130481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91569240 + 91569241.

It is an arithmetic number, because the mean of its divisors is an integer number (91569241).

Almost surely, 2^183138481 is an apocalyptic number.

It is an amenable number.

183138481 is a deficient number, since it is larger than the sum of its proper divisors (1).

183138481 is an equidigital number, since it uses as much as digits as its factorization.

183138481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 37.

The square root of 183138481 is about 13532.8666955675. The cubic root of 183138481 is about 567.8843092833.

The spelling of 183138481 in words is "one hundred eighty-three million, one hundred thirty-eight thousand, four hundred eighty-one".