64881317 has 2 divisors, whose sum is σ = 64881318. Its totient is φ = 64881316.

The previous prime is 64881293. The next prime is 64881331. The reversal of 64881317 is 71318846.

64881317 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., 45819361 + 19061956 = 6769^2 + 4366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64881317 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 (64881347) 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, 32440658 + 32440659.

It is an arithmetic number, because the mean of its divisors is an integer number (32440659).

Almost surely, 2^64881317 is an apocalyptic number.

It is an amenable number.

64881317 is a deficient number, since it is larger than the sum of its proper divisors (1).

64881317 is an equidigital number, since it uses as much as digits as its factorization.

64881317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 64881317 is about 8054.8939781974. The cubic root of 64881317 is about 401.8277130262.

The spelling of 64881317 in words is "sixty-four million, eight hundred eighty-one thousand, three hundred seventeen".