408244813 has 2 divisors, whose sum is σ = 408244814. Its totient is φ = 408244812.

The previous prime is 408244789. The next prime is 408244819. The reversal of 408244813 is 318442804.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287200809 + 121044004 = 16947^2 + 11002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408244813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408244819) 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, 204122406 + 204122407.

It is an arithmetic number, because the mean of its divisors is an integer number (204122407).

Almost surely, 2^408244813 is an apocalyptic number.

It is an amenable number.

408244813 is a deficient number, since it is larger than the sum of its proper divisors (1).

408244813 is an equidigital number, since it uses as much as digits as its factorization.

408244813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 408244813 is about 20205.0689927058. The cubic root of 408244813 is about 741.8342692607.

The spelling of 408244813 in words is "four hundred eight million, two hundred forty-four thousand, eight hundred thirteen".