663049693 has 2 divisors, whose sum is σ = 663049694. Its totient is φ = 663049692.

The previous prime is 663049679. The next prime is 663049753. The reversal of 663049693 is 396940366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430853049 + 232196644 = 20757^2 + 15238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663049693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663049603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331524846 + 331524847.

It is an arithmetic number, because the mean of its divisors is an integer number (331524847).

Almost surely, 2^663049693 is an apocalyptic number.

It is an amenable number.

663049693 is a deficient number, since it is larger than the sum of its proper divisors (1).

663049693 is an equidigital number, since it uses as much as digits as its factorization.

663049693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 46.

The square root of 663049693 is about 25749.7513191875. The cubic root of 663049693 is about 871.9977401710.

The spelling of 663049693 in words is "six hundred sixty-three million, forty-nine thousand, six hundred ninety-three".