64817671 has 2 divisors, whose sum is σ = 64817672. Its totient is φ = 64817670.

The previous prime is 64817647. The next prime is 64817677. The reversal of 64817671 is 17671846.

64817671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64817671 - 2¹⁷ = 64686599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64817677) 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, 32408835 + 32408836.

It is an arithmetic number, because the mean of its divisors is an integer number (32408836).

Almost surely, 2^64817671 is an apocalyptic number.

64817671 is a deficient number, since it is larger than the sum of its proper divisors (1).

64817671 is an equidigital number, since it uses as much as digits as its factorization.

64817671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 64817671 is about 8050.9422429924. The cubic root of 64817671 is about 401.6962776867.

The spelling of 64817671 in words is "sixty-four million, eight hundred seventeen thousand, six hundred seventy-one".