865744493 has 2 divisors, whose sum is σ = 865744494. Its totient is φ = 865744492.

The previous prime is 865744487. The next prime is 865744501. The reversal of 865744493 is 394447568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843437764 + 22306729 = 29042^2 + 4723^2 .

It is a cyclic number.

It is not a de Polignac number, because 865744493 - 2¹⁰ = 865743469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865744433) 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, 432872246 + 432872247.

It is an arithmetic number, because the mean of its divisors is an integer number (432872247).

Almost surely, 2^865744493 is an apocalyptic number.

It is an amenable number.

865744493 is a deficient number, since it is larger than the sum of its proper divisors (1).

865744493 is an equidigital number, since it uses as much as digits as its factorization.

865744493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 50.

The square root of 865744493 is about 29423.5363782126. The cubic root of 865744493 is about 953.0812210769.

The spelling of 865744493 in words is "eight hundred sixty-five million, seven hundred forty-four thousand, four hundred ninety-three".