8390663 has 2 divisors, whose sum is σ = 8390664. Its totient is φ = 8390662.

The previous prime is 8390623. The next prime is 8390671. The reversal of 8390663 is 3660938.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8390663 - 2²⁰ = 7342087 is a prime.

It is a Sophie Germain 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 (8390623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4195331 + 4195332.

It is an arithmetic number, because the mean of its divisors is an integer number (4195332).

Almost surely, 2^8390663 is an apocalyptic number.

8390663 is a deficient number, since it is larger than the sum of its proper divisors (1).

8390663 is an equidigital number, since it uses as much as digits as its factorization.

8390663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 8390663 is about 2896.6641158408. The cubic root of 8390663 is about 203.2039252424.

The spelling of 8390663 in words is "eight million, three hundred ninety thousand, six hundred sixty-three".