404344181 has 2 divisors, whose sum is σ = 404344182. Its totient is φ = 404344180.

The previous prime is 404344159. The next prime is 404344223. The reversal of 404344181 is 181443404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284091025 + 120253156 = 16855^2 + 10966^2 .

It is a cyclic number.

It is not a de Polignac number, because 404344181 - 2¹⁰ = 404343157 is a prime.

It is a super-2 number, since 2×404344181² = 326988433417121522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404344121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202172090 + 202172091.

It is an arithmetic number, because the mean of its divisors is an integer number (202172091).

Almost surely, 2^404344181 is an apocalyptic number.

It is an amenable number.

404344181 is a deficient number, since it is larger than the sum of its proper divisors (1).

404344181 is an equidigital number, since it uses as much as digits as its factorization.

404344181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 404344181 is about 20108.3112418721. The cubic root of 404344181 is about 739.4640513020.

Adding to 404344181 its reverse (181443404), we get a palindrome (585787585).

The spelling of 404344181 in words is "four hundred four million, three hundred forty-four thousand, one hundred eighty-one".