663307943 has 2 divisors, whose sum is σ = 663307944. Its totient is φ = 663307942.

The previous prime is 663307907. The next prime is 663307951. The reversal of 663307943 is 349703366.

663307943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663307943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663307943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663307903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331653971 + 331653972.

It is an arithmetic number, because the mean of its divisors is an integer number (331653972).

Almost surely, 2^663307943 is an apocalyptic number.

663307943 is a deficient number, since it is larger than the sum of its proper divisors (1).

663307943 is an equidigital number, since it uses as much as digits as its factorization.

663307943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 41.

The square root of 663307943 is about 25754.7654425351. The cubic root of 663307943 is about 872.1109364057.

The spelling of 663307943 in words is "six hundred sixty-three million, three hundred seven thousand, nine hundred forty-three".