408505859 has 2 divisors, whose sum is σ = 408505860. Its totient is φ = 408505858.

The previous prime is 408505819. The next prime is 408505907. The reversal of 408505859 is 958505804.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408505859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (408505819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204252929 + 204252930.

It is an arithmetic number, because the mean of its divisors is an integer number (204252930).

Almost surely, 2^408505859 is an apocalyptic number.

408505859 is a deficient number, since it is larger than the sum of its proper divisors (1).

408505859 is an equidigital number, since it uses as much as digits as its factorization.

408505859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 44.

The square root of 408505859 is about 20211.5278739634. The cubic root of 408505859 is about 741.9923538225.

Subtracting 408505859 from its reverse (958505804), we obtain a palindrome (549999945).

The spelling of 408505859 in words is "four hundred eight million, five hundred five thousand, eight hundred fifty-nine".