8689366849 has 2 divisors, whose sum is σ = 8689366850. Its totient is φ = 8689366848.

The previous prime is 8689366813. The next prime is 8689366877. The reversal of 8689366849 is 9486639868.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4385088400 + 4304278449 = 66220^2 + 65607^2 .

It is a cyclic number.

It is not a de Polignac number, because 8689366849 - 2²⁹ = 8152495937 is a prime.

It is not a weakly prime, because it can be changed into another prime (8689363849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4344683424 + 4344683425.

It is an arithmetic number, because the mean of its divisors is an integer number (4344683425).

Almost surely, 2^8689366849 is an apocalyptic number.

It is an amenable number.

8689366849 is a deficient number, since it is larger than the sum of its proper divisors (1).

8689366849 is an equidigital number, since it uses as much as digits as its factorization.

8689366849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107495424, while the sum is 67.

The square root of 8689366849 is about 93216.7734316094. The cubic root of 8689366849 is about 2055.8718700432.

The spelling of 8689366849 in words is "eight billion, six hundred eighty-nine million, three hundred sixty-six thousand, eight hundred forty-nine".