64091393 has 2 divisors, whose sum is σ = 64091394. Its totient is φ = 64091392.

The previous prime is 64091381. The next prime is 64091399. The reversal of 64091393 is 39319046.

64091393 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., 56731024 + 7360369 = 7532^2 + 2713^2 .

It is a cyclic number.

It is not a de Polignac number, because 64091393 - 2²⁴ = 47314177 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 (64091399) 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, 32045696 + 32045697.

It is an arithmetic number, because the mean of its divisors is an integer number (32045697).

Almost surely, 2^64091393 is an apocalyptic number.

It is an amenable number.

64091393 is a deficient number, since it is larger than the sum of its proper divisors (1).

64091393 is an equidigital number, since it uses as much as digits as its factorization.

64091393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 64091393 is about 8005.7100247261. The cubic root of 64091393 is about 400.1903115228.

The spelling of 64091393 in words is "sixty-four million, ninety-one thousand, three hundred ninety-three".