865787230769 has 2 divisors, whose sum is σ = 865787230770. Its totient is φ = 865787230768.

The previous prime is 865787230733. The next prime is 865787230783. The reversal of 865787230769 is 967032787568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 847531978225 + 18255252544 = 920615^2 + 135112^2 .

It is a cyclic number.

It is not a de Polignac number, because 865787230769 - 2¹⁶ = 865787165233 is a prime.

It is a super-2 number, since 2×865787230769² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 865787230699 and 865787230708.

It is not a weakly prime, because it can be changed into another prime (865787230669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432893615384 + 432893615385.

It is an arithmetic number, because the mean of its divisors is an integer number (432893615385).

Almost surely, 2^865787230769 is an apocalyptic number.

It is an amenable number.

865787230769 is a deficient number, since it is larger than the sum of its proper divisors (1).

865787230769 is an equidigital number, since it uses as much as digits as its factorization.

865787230769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 213373440, while the sum is 68.

The spelling of 865787230769 in words is "eight hundred sixty-five billion, seven hundred eighty-seven million, two hundred thirty thousand, seven hundred sixty-nine".