865343893 has 2 divisors, whose sum is σ = 865343894. Its totient is φ = 865343892.

The previous prime is 865343867. The next prime is 865343957. The reversal of 865343893 is 398343568.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 466862449 + 398481444 = 21607^2 + 19962^2 .

It is a cyclic number.

It is not a de Polignac number, because 865343893 - 2¹³ = 865335701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865343803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432671946 + 432671947.

It is an arithmetic number, because the mean of its divisors is an integer number (432671947).

Almost surely, 2^865343893 is an apocalyptic number.

It is an amenable number.

865343893 is a deficient number, since it is larger than the sum of its proper divisors (1).

865343893 is an equidigital number, since it uses as much as digits as its factorization.

865343893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 49.

The square root of 865343893 is about 29416.7281151388. The cubic root of 865343893 is about 952.9341941556.

The spelling of 865343893 in words is "eight hundred sixty-five million, three hundred forty-three thousand, eight hundred ninety-three".