64494817 has 2 divisors, whose sum is σ = 64494818. Its totient is φ = 64494816.

The previous prime is 64494761. The next prime is 64494823. The reversal of 64494817 is 71849446.

64494817 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., 34999056 + 29495761 = 5916^2 + 5431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64494817 is a prime.

It is not a weakly prime, because it can be changed into another prime (64494827) 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, 32247408 + 32247409.

It is an arithmetic number, because the mean of its divisors is an integer number (32247409).

Almost surely, 2^64494817 is an apocalyptic number.

It is an amenable number.

64494817 is a deficient number, since it is larger than the sum of its proper divisors (1).

64494817 is an equidigital number, since it uses as much as digits as its factorization.

64494817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 64494817 is about 8030.8665161364. The cubic root of 64494817 is about 401.0282233770.

The spelling of 64494817 in words is "sixty-four million, four hundred ninety-four thousand, eight hundred seventeen".