608916809 has 2 divisors, whose sum is σ = 608916810. Its totient is φ = 608916808.

The previous prime is 608916797. The next prime is 608916811. The reversal of 608916809 is 908619806.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576960400 + 31956409 = 24020^2 + 5653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-608916809 is a prime.

Together with 608916811, it forms a pair of twin primes.

It is a Chen prime.

608916809 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (608916859) 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, 304458404 + 304458405.

It is an arithmetic number, because the mean of its divisors is an integer number (304458405).

Almost surely, 2^608916809 is an apocalyptic number.

It is an amenable number.

608916809 is a deficient number, since it is larger than the sum of its proper divisors (1).

608916809 is an equidigital number, since it uses as much as digits as its factorization.

608916809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 608916809 is about 24676.2397662205. The cubic root of 608916809 is about 847.5903189188.

The spelling of 608916809 in words is "six hundred eight million, nine hundred sixteen thousand, eight hundred nine".