63663749 has 2 divisors, whose sum is σ = 63663750. Its totient is φ = 63663748.

The previous prime is 63663731. The next prime is 63663751. The reversal of 63663749 is 94736636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59985025 + 3678724 = 7745^2 + 1918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63663749 is a prime.

Together with 63663751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63663799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31831874 + 31831875.

It is an arithmetic number, because the mean of its divisors is an integer number (31831875).

Almost surely, 2^63663749 is an apocalyptic number.

It is an amenable number.

63663749 is a deficient number, since it is larger than the sum of its proper divisors (1).

63663749 is an equidigital number, since it uses as much as digits as its factorization.

63663749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 44.

The square root of 63663749 is about 7978.9566360521. The cubic root of 63663749 is about 399.2982466589.

The spelling of 63663749 in words is "sixty-three million, six hundred sixty-three thousand, seven hundred forty-nine".