663444349 has 2 divisors, whose sum is σ = 663444350. Its totient is φ = 663444348.

The previous prime is 663444293. The next prime is 663444389. The reversal of 663444349 is 943444366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609201124 + 54243225 = 24682^2 + 7365^2 .

It is a cyclic number.

It is not a de Polignac number, because 663444349 - 2¹³ = 663436157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663444389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331722174 + 331722175.

It is an arithmetic number, because the mean of its divisors is an integer number (331722175).

Almost surely, 2^663444349 is an apocalyptic number.

It is an amenable number.

663444349 is a deficient number, since it is larger than the sum of its proper divisors (1).

663444349 is an equidigital number, since it uses as much as digits as its factorization.

663444349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 43.

The square root of 663444349 is about 25757.4134765120. The cubic root of 663444349 is about 872.1707140761.

The spelling of 663444349 in words is "six hundred sixty-three million, four hundred forty-four thousand, three hundred forty-nine".