64865597 has 2 divisors, whose sum is σ = 64865598. Its totient is φ = 64865596.

The previous prime is 64865561. The next prime is 64865611. The reversal of 64865597 is 79556846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49857721 + 15007876 = 7061^2 + 3874^2 .

It is a cyclic number.

It is not a de Polignac number, because 64865597 - 2¹⁰ = 64864573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64865797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32432798 + 32432799.

It is an arithmetic number, because the mean of its divisors is an integer number (32432799).

Almost surely, 2^64865597 is an apocalyptic number.

It is an amenable number.

64865597 is a deficient number, since it is larger than the sum of its proper divisors (1).

64865597 is an equidigital number, since it uses as much as digits as its factorization.

64865597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 50.

The square root of 64865597 is about 8053.9181148060. The cubic root of 64865597 is about 401.7952576540.

The spelling of 64865597 in words is "sixty-four million, eight hundred sixty-five thousand, five hundred ninety-seven".