865393393 has 2 divisors, whose sum is σ = 865393394. Its totient is φ = 865393392.

The previous prime is 865393343. The next prime is 865393439. The reversal of 865393393 is 393393568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 639432369 + 225961024 = 25287^2 + 15032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865393393 is a prime.

It is not a weakly prime, because it can be changed into another prime (865393343) 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, 432696696 + 432696697.

It is an arithmetic number, because the mean of its divisors is an integer number (432696697).

Almost surely, 2^865393393 is an apocalyptic number.

It is an amenable number.

865393393 is a deficient number, since it is larger than the sum of its proper divisors (1).

865393393 is an equidigital number, since it uses as much as digits as its factorization.

865393393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1574640, while the sum is 49.

The square root of 865393393 is about 29417.5694611231. The cubic root of 865393393 is about 952.9523639428.

The spelling of 865393393 in words is "eight hundred sixty-five million, three hundred ninety-three thousand, three hundred ninety-three".