408840863 has 2 divisors, whose sum is σ = 408840864. Its totient is φ = 408840862.

The previous prime is 408840857. The next prime is 408840881. The reversal of 408840863 is 368048804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 408840863 - 2¹⁰ = 408839839 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 408840863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408840163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204420431 + 204420432.

It is an arithmetic number, because the mean of its divisors is an integer number (204420432).

Almost surely, 2^408840863 is an apocalyptic number.

408840863 is a deficient number, since it is larger than the sum of its proper divisors (1).

408840863 is an equidigital number, since it uses as much as digits as its factorization.

408840863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 41.

The square root of 408840863 is about 20219.8136242647. The cubic root of 408840863 is about 742.1951273230.

The spelling of 408840863 in words is "four hundred eight million, eight hundred forty thousand, eight hundred sixty-three".