64784647 has 2 divisors, whose sum is σ = 64784648. Its totient is φ = 64784646.

The previous prime is 64784641. The next prime is 64784663. The reversal of 64784647 is 74648746.

64784647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64784647 - 2³ = 64784639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64784597 and 64784606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64784641) 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, 32392323 + 32392324.

It is an arithmetic number, because the mean of its divisors is an integer number (32392324).

Almost surely, 2^64784647 is an apocalyptic number.

64784647 is a deficient number, since it is larger than the sum of its proper divisors (1).

64784647 is an equidigital number, since it uses as much as digits as its factorization.

64784647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 46.

The square root of 64784647 is about 8048.8910416280. The cubic root of 64784647 is about 401.6280459262.

The spelling of 64784647 in words is "sixty-four million, seven hundred eighty-four thousand, six hundred forty-seven".