181982011 has 2 divisors, whose sum is σ = 181982012. Its totient is φ = 181982010.

The previous prime is 181981993. The next prime is 181982023. The reversal of 181982011 is 110289181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 181982011 - 2⁷ = 181981883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (181982051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90991005 + 90991006.

It is an arithmetic number, because the mean of its divisors is an integer number (90991006).

Almost surely, 2^181982011 is an apocalyptic number.

181982011 is a deficient number, since it is larger than the sum of its proper divisors (1).

181982011 is an equidigital number, since it uses as much as digits as its factorization.

181982011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 31.

The square root of 181982011 is about 13490.0708300587. The cubic root of 181982011 is about 566.6864390256.

The spelling of 181982011 in words is "one hundred eighty-one million, nine hundred eighty-two thousand, eleven".