181904141 has 2 divisors, whose sum is σ = 181904142. Its totient is φ = 181904140.

The previous prime is 181904083. The next prime is 181904159. The reversal of 181904141 is 141409181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177156100 + 4748041 = 13310^2 + 2179^2 .

It is an emirp because it is prime and its reverse (141409181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181904141 - 2²² = 177709837 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181904161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90952070 + 90952071.

It is an arithmetic number, because the mean of its divisors is an integer number (90952071).

Almost surely, 2^181904141 is an apocalyptic number.

It is an amenable number.

181904141 is a deficient number, since it is larger than the sum of its proper divisors (1).

181904141 is an equidigital number, since it uses as much as digits as its factorization.

181904141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 181904141 is about 13487.1843243874. The cubic root of 181904141 is about 566.6055992247.

The spelling of 181904141 in words is "one hundred eighty-one million, nine hundred four thousand, one hundred forty-one".