64693217 has 2 divisors, whose sum is σ = 64693218. Its totient is φ = 64693216.

The previous prime is 64693207. The next prime is 64693243. The reversal of 64693217 is 71239646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36857041 + 27836176 = 6071^2 + 5276^2 .

It is a cyclic number.

It is not a de Polignac number, because 64693217 - 2¹⁰ = 64692193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64693207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32346608 + 32346609.

It is an arithmetic number, because the mean of its divisors is an integer number (32346609).

Almost surely, 2^64693217 is an apocalyptic number.

It is an amenable number.

64693217 is a deficient number, since it is larger than the sum of its proper divisors (1).

64693217 is an equidigital number, since it uses as much as digits as its factorization.

64693217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 64693217 is about 8043.2093718863. The cubic root of 64693217 is about 401.4390189365.

The spelling of 64693217 in words is "sixty-four million, six hundred ninety-three thousand, two hundred seventeen".