64751917 has 2 divisors, whose sum is σ = 64751918. Its totient is φ = 64751916.

The previous prime is 64751893. The next prime is 64751957. The reversal of 64751917 is 71915746.

64751917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (64751957) can be obtained adding 64751917 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64416676 + 335241 = 8026^2 + 579^2 .

It is a cyclic number.

It is not a de Polignac number, because 64751917 - 2⁷ = 64751789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64751917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64751957) 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, 32375958 + 32375959.

It is an arithmetic number, because the mean of its divisors is an integer number (32375959).

Almost surely, 2^64751917 is an apocalyptic number.

It is an amenable number.

64751917 is a deficient number, since it is larger than the sum of its proper divisors (1).

64751917 is an equidigital number, since it uses as much as digits as its factorization.

64751917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 64751917 is about 8046.8575854180. The cubic root of 64751917 is about 401.5603987243.

The spelling of 64751917 in words is "sixty-four million, seven hundred fifty-one thousand, nine hundred seventeen".