8192821909 has 2 divisors, whose sum is σ = 8192821910. Its totient is φ = 8192821908.

The previous prime is 8192821877. The next prime is 8192821913. The reversal of 8192821909 is 9091282918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4195800625 + 3997021284 = 64775^2 + 63222^2 .

It is a cyclic number.

It is not a de Polignac number, because 8192821909 - 2⁵ = 8192821877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8192821919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4096410954 + 4096410955.

It is an arithmetic number, because the mean of its divisors is an integer number (4096410955).

Almost surely, 2^8192821909 is an apocalyptic number.

It is an amenable number.

8192821909 is a deficient number, since it is larger than the sum of its proper divisors (1).

8192821909 is an equidigital number, since it uses as much as digits as its factorization.

8192821909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 8192821909 is about 90514.2083266489. The cubic root of 8192821909 is about 2015.9410955753.

The spelling of 8192821909 in words is "eight billion, one hundred ninety-two million, eight hundred twenty-one thousand, nine hundred nine".