663388247 has 2 divisors, whose sum is σ = 663388248. Its totient is φ = 663388246.

The previous prime is 663388199. The next prime is 663388259. The reversal of 663388247 is 742883366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663388247 - 2¹² = 663384151 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 (663388277) 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, 331694123 + 331694124.

It is an arithmetic number, because the mean of its divisors is an integer number (331694124).

Almost surely, 2^663388247 is an apocalyptic number.

663388247 is a deficient number, since it is larger than the sum of its proper divisors (1).

663388247 is an equidigital number, since it uses as much as digits as its factorization.

663388247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 47.

The square root of 663388247 is about 25756.3244078032. The cubic root of 663388247 is about 872.1461292958.

The spelling of 663388247 in words is "six hundred sixty-three million, three hundred eighty-eight thousand, two hundred forty-seven".