8136770209 has 2 divisors, whose sum is σ = 8136770210. Its totient is φ = 8136770208.

The previous prime is 8136770153. The next prime is 8136770221. The reversal of 8136770209 is 9020776318.

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., 5002449984 + 3134320225 = 70728^2 + 55985^2 .

It is a cyclic number.

It is not a de Polignac number, because 8136770209 - 2²⁵ = 8103215777 is a prime.

It is not a weakly prime, because it can be changed into another prime (8136770269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4068385104 + 4068385105.

It is an arithmetic number, because the mean of its divisors is an integer number (4068385105).

Almost surely, 2^8136770209 is an apocalyptic number.

It is an amenable number.

8136770209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8136770209 is an equidigital number, since it uses as much as digits as its factorization.

8136770209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 8136770209 is about 90204.0476309129. The cubic root of 8136770209 is about 2011.3331756776. Note that the first 3 decimals are identical.

The spelling of 8136770209 in words is "eight billion, one hundred thirty-six million, seven hundred seventy thousand, two hundred nine".