808683989 has 2 divisors, whose sum is σ = 808683990. Its totient is φ = 808683988.

The previous prime is 808683943. The next prime is 808684001. The reversal of 808683989 is 989386808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 800607025 + 8076964 = 28295^2 + 2842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808683989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808683919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404341994 + 404341995.

It is an arithmetic number, because the mean of its divisors is an integer number (404341995).

Almost surely, 2^808683989 is an apocalyptic number.

It is an amenable number.

808683989 is a deficient number, since it is larger than the sum of its proper divisors (1).

808683989 is an equidigital number, since it uses as much as digits as its factorization.

808683989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 808683989 is about 28437.3695865142. The cubic root of 808683989 is about 931.6646445376.

The spelling of 808683989 in words is "eight hundred eight million, six hundred eighty-three thousand, nine hundred eighty-nine".