865929995893 has 2 divisors, whose sum is σ = 865929995894. Its totient is φ = 865929995892.

The previous prime is 865929995857. The next prime is 865929995941. The reversal of 865929995893 is 398599929568.

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., 629891433649 + 236038562244 = 793657^2 + 485838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865929995893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865929995813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432964997946 + 432964997947.

It is an arithmetic number, because the mean of its divisors is an integer number (432964997947).

Almost surely, 2^865929995893 is an apocalyptic number.

It is an amenable number.

865929995893 is a deficient number, since it is larger than the sum of its proper divisors (1).

865929995893 is an equidigital number, since it uses as much as digits as its factorization.

865929995893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3401222400, while the sum is 82.

The spelling of 865929995893 in words is "eight hundred sixty-five billion, nine hundred twenty-nine million, nine hundred ninety-five thousand, eight hundred ninety-three".