843796671217 has 2 divisors, whose sum is σ = 843796671218. Its totient is φ = 843796671216.

The previous prime is 843796671149. The next prime is 843796671233. The reversal of 843796671217 is 712176697348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 524047135921 + 319749535296 = 723911^2 + 565464^2 .

It is a cyclic number.

It is not a de Polignac number, because 843796671217 - 2³¹ = 841649187569 is a prime.

It is a super-2 number, since 2×843796671217² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (843796671247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421898335608 + 421898335609.

It is an arithmetic number, because the mean of its divisors is an integer number (421898335609).

Almost surely, 2^843796671217 is an apocalyptic number.

It is an amenable number.

843796671217 is a deficient number, since it is larger than the sum of its proper divisors (1).

843796671217 is an equidigital number, since it uses as much as digits as its factorization.

843796671217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21337344, while the sum is 61.

The spelling of 843796671217 in words is "eight hundred forty-three billion, seven hundred ninety-six million, six hundred seventy-one thousand, two hundred seventeen".