9856346789 has 2 divisors, whose sum is σ = 9856346790. Its totient is φ = 9856346788.

The previous prime is 9856346719. The next prime is 9856346813. The reversal of 9856346789 is 9876436589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5664820225 + 4191526564 = 75265^2 + 64742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9856346789 is a prime.

It is a super-2 number, since 2×9856346789² (a number of 21 digits) contains 22 as substring.

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 (9856346719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4928173394 + 4928173395.

It is an arithmetic number, because the mean of its divisors is an integer number (4928173395).

Almost surely, 2^9856346789 is an apocalyptic number.

It is an amenable number.

9856346789 is a deficient number, since it is larger than the sum of its proper divisors (1).

9856346789 is an equidigital number, since it uses as much as digits as its factorization.

9856346789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78382080, while the sum is 65.

The square root of 9856346789 is about 99279.1357184378. The cubic root of 9856346789 is about 2144.0685105554.

The spelling of 9856346789 in words is "nine billion, eight hundred fifty-six million, three hundred forty-six thousand, seven hundred eighty-nine".