181090841 has 2 divisors, whose sum is σ = 181090842. Its totient is φ = 181090840.

The previous prime is 181090823. The next prime is 181090867. The reversal of 181090841 is 148090181.

181090841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166306816 + 14784025 = 12896^2 + 3845^2 .

It is an emirp because it is prime and its reverse (148090181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181090841 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 181090798 and 181090807.

It is not a weakly prime, because it can be changed into another prime (181090801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90545420 + 90545421.

It is an arithmetic number, because the mean of its divisors is an integer number (90545421).

Almost surely, 2^181090841 is an apocalyptic number.

It is an amenable number.

181090841 is a deficient number, since it is larger than the sum of its proper divisors (1).

181090841 is an equidigital number, since it uses as much as digits as its factorization.

181090841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 181090841 is about 13456.9997027569. Note that the first 3 decimals coincide. The cubic root of 181090841 is about 565.7598995359.

The spelling of 181090841 in words is "one hundred eighty-one million, ninety thousand, eight hundred forty-one".