64893217 has 2 divisors, whose sum is σ = 64893218. Its totient is φ = 64893216.

The previous prime is 64893187. The next prime is 64893239. The reversal of 64893217 is 71239846.

64893217 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 can be written as a sum of positive squares in only one way, i.e., 63345681 + 1547536 = 7959^2 + 1244^2 .

It is a cyclic number.

It is not a de Polignac number, because 64893217 - 2⁷ = 64893089 is a prime.

It is a super-2 number, since 2×64893217² = 8422259225218178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64893217.

It is not a weakly prime, because it can be changed into another prime (64893247) 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, 32446608 + 32446609.

It is an arithmetic number, because the mean of its divisors is an integer number (32446609).

Almost surely, 2^64893217 is an apocalyptic number.

It is an amenable number.

64893217 is a deficient number, since it is larger than the sum of its proper divisors (1).

64893217 is an equidigital number, since it uses as much as digits as its factorization.

64893217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 64893217 is about 8055.6326256850. The cubic root of 64893217 is about 401.8522781742.

The spelling of 64893217 in words is "sixty-four million, eight hundred ninety-three thousand, two hundred seventeen".