181080491 has 2 divisors, whose sum is σ = 181080492. Its totient is φ = 181080490.

The previous prime is 181080457. The next prime is 181080509. The reversal of 181080491 is 194080181.

181080491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 181080491 - 2¹⁰ = 181079467 is a prime.

It is not a weakly prime, because it can be changed into another prime (181080421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90540245 + 90540246.

It is an arithmetic number, because the mean of its divisors is an integer number (90540246).

Almost surely, 2^181080491 is an apocalyptic number.

181080491 is a deficient number, since it is larger than the sum of its proper divisors (1).

181080491 is an equidigital number, since it uses as much as digits as its factorization.

181080491 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 181080491 is about 13456.6151390311. The cubic root of 181080491 is about 565.7491209187.

The spelling of 181080491 in words is "one hundred eighty-one million, eighty thousand, four hundred ninety-one".