64897361 has 2 divisors, whose sum is σ = 64897362. Its totient is φ = 64897360.

The previous prime is 64897267. The next prime is 64897367. The reversal of 64897361 is 16379846.

64897361 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., 63504961 + 1392400 = 7969^2 + 1180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64897361 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64897367) 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, 32448680 + 32448681.

It is an arithmetic number, because the mean of its divisors is an integer number (32448681).

Almost surely, 2^64897361 is an apocalyptic number.

It is an amenable number.

64897361 is a deficient number, since it is larger than the sum of its proper divisors (1).

64897361 is an equidigital number, since it uses as much as digits as its factorization.

64897361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 64897361 is about 8055.8898329111. The cubic root of 64897361 is about 401.8608319208.

The spelling of 64897361 in words is "sixty-four million, eight hundred ninety-seven thousand, three hundred sixty-one".