63819449 has 2 divisors, whose sum is σ = 63819450. Its totient is φ = 63819448.

The previous prime is 63819419. The next prime is 63819523. The reversal of 63819449 is 94491836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44983849 + 18835600 = 6707^2 + 4340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63819449 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (63819419) 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, 31909724 + 31909725.

It is an arithmetic number, because the mean of its divisors is an integer number (31909725).

Almost surely, 2^63819449 is an apocalyptic number.

It is an amenable number.

63819449 is a deficient number, since it is larger than the sum of its proper divisors (1).

63819449 is an equidigital number, since it uses as much as digits as its factorization.

63819449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 63819449 is about 7988.7075925959. The cubic root of 63819449 is about 399.6234978098.

The spelling of 63819449 in words is "sixty-three million, eight hundred nineteen thousand, four hundred forty-nine".