8461668869 has 2 divisors, whose sum is σ = 8461668870. Its totient is φ = 8461668868.

The previous prime is 8461668823. The next prime is 8461668883. The reversal of 8461668869 is 9688661648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4402322500 + 4059346369 = 66350^2 + 63713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8461668869 is a prime.

It is a super-2 number, since 2×8461668869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8461668889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4230834434 + 4230834435.

It is an arithmetic number, because the mean of its divisors is an integer number (4230834435).

Almost surely, 2^8461668869 is an apocalyptic number.

It is an amenable number.

8461668869 is a deficient number, since it is larger than the sum of its proper divisors (1).

8461668869 is an equidigital number, since it uses as much as digits as its factorization.

8461668869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23887872, while the sum is 62.

The square root of 8461668869 is about 91987.3299373343. The cubic root of 8461668869 is about 2037.7551935696.

The spelling of 8461668869 in words is "eight billion, four hundred sixty-one million, six hundred sixty-eight thousand, eight hundred sixty-nine".