64750321 has 2 divisors, whose sum is σ = 64750322. Its totient is φ = 64750320.

The previous prime is 64750307. The next prime is 64750327. The reversal of 64750321 is 12305746.

64750321 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., 44823025 + 19927296 = 6695^2 + 4464^2 .

It is a cyclic number.

It is not a de Polignac number, because 64750321 - 2⁹ = 64749809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64750321.

It is not a weakly prime, because it can be changed into another prime (64750327) 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, 32375160 + 32375161.

It is an arithmetic number, because the mean of its divisors is an integer number (32375161).

Almost surely, 2^64750321 is an apocalyptic number.

It is an amenable number.

64750321 is a deficient number, since it is larger than the sum of its proper divisors (1).

64750321 is an equidigital number, since it uses as much as digits as its factorization.

64750321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 64750321 is about 8046.7584156603. The cubic root of 64750321 is about 401.5570994878.

The spelling of 64750321 in words is "sixty-four million, seven hundred fifty thousand, three hundred twenty-one".