404653481 has 2 divisors, whose sum is σ = 404653482. Its totient is φ = 404653480.

The previous prime is 404653451. The next prime is 404653489. The reversal of 404653481 is 184356404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404653456 + 25 = 20116^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 404653481 - 2¹⁴ = 404637097 is a prime.

It is a super-2 number, since 2×404653481² = 327488879370834722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (404653489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202326740 + 202326741.

It is an arithmetic number, because the mean of its divisors is an integer number (202326741).

Almost surely, 2^404653481 is an apocalyptic number.

It is an amenable number.

404653481 is a deficient number, since it is larger than the sum of its proper divisors (1).

404653481 is an equidigital number, since it uses as much as digits as its factorization.

404653481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 404653481 is about 20116.0006213959. Note that the first 3 decimals coincide. The cubic root of 404653481 is about 739.6525523764.

The spelling of 404653481 in words is "four hundred four million, six hundred fifty-three thousand, four hundred eighty-one".