404044513 has 2 divisors, whose sum is σ = 404044514. Its totient is φ = 404044512.

The previous prime is 404044507. The next prime is 404044517. The reversal of 404044513 is 315440404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399080529 + 4963984 = 19977^2 + 2228^2 .

It is a cyclic number.

It is not a de Polignac number, because 404044513 - 2⁹ = 404044001 is a prime.

It is not a weakly prime, because it can be changed into another prime (404044517) 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, 202022256 + 202022257.

It is an arithmetic number, because the mean of its divisors is an integer number (202022257).

Almost surely, 2^404044513 is an apocalyptic number.

It is an amenable number.

404044513 is a deficient number, since it is larger than the sum of its proper divisors (1).

404044513 is an equidigital number, since it uses as much as digits as its factorization.

404044513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 404044513 is about 20100.8585140038. The cubic root of 404044513 is about 739.2813286869.

Adding to 404044513 its reverse (315440404), we get a palindrome (719484917).

The spelling of 404044513 in words is "four hundred four million, forty-four thousand, five hundred thirteen".