663247049 has 2 divisors, whose sum is σ = 663247050. Its totient is φ = 663247048.

The previous prime is 663247043. The next prime is 663247051. The reversal of 663247049 is 940742366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403005625 + 260241424 = 20075^2 + 16132^2 .

It is a cyclic number.

It is not a de Polignac number, because 663247049 - 2¹² = 663242953 is a prime.

Together with 663247051, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 663246997 and 663247015.

It is not a weakly prime, because it can be changed into another prime (663247043) 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, 331623524 + 331623525.

It is an arithmetic number, because the mean of its divisors is an integer number (331623525).

Almost surely, 2^663247049 is an apocalyptic number.

It is an amenable number.

663247049 is a deficient number, since it is larger than the sum of its proper divisors (1).

663247049 is an equidigital number, since it uses as much as digits as its factorization.

663247049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 663247049 is about 25753.5832264173. The cubic root of 663247049 is about 872.0842479729.

The spelling of 663247049 in words is "six hundred sixty-three million, two hundred forty-seven thousand, forty-nine".