63784649 has 2 divisors, whose sum is σ = 63784650. Its totient is φ = 63784648.

The previous prime is 63784619. The next prime is 63784703. The reversal of 63784649 is 94648736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60295225 + 3489424 = 7765^2 + 1868^2 .

It is a cyclic number.

It is not a de Polignac number, because 63784649 - 2⁸ = 63784393 is a prime.

It is not a weakly prime, because it can be changed into another prime (63784619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31892324 + 31892325.

It is an arithmetic number, because the mean of its divisors is an integer number (31892325).

Almost surely, 2^63784649 is an apocalyptic number.

It is an amenable number.

63784649 is a deficient number, since it is larger than the sum of its proper divisors (1).

63784649 is an equidigital number, since it uses as much as digits as its factorization.

63784649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The square root of 63784649 is about 7986.5292211323. The cubic root of 63784649 is about 399.5508479281.

The spelling of 63784649 in words is "sixty-three million, seven hundred eighty-four thousand, six hundred forty-nine".