8636940121 has 2 divisors, whose sum is σ = 8636940122. Its totient is φ = 8636940120.

The previous prime is 8636940097. The next prime is 8636940127. The reversal of 8636940121 is 1210496368.

8636940121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8292652096 + 344288025 = 91064^2 + 18555^2 .

It is a cyclic number.

It is not a de Polignac number, because 8636940121 - 2⁹ = 8636939609 is a prime.

It is not a weakly prime, because it can be changed into another prime (8636940127) 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, 4318470060 + 4318470061.

It is an arithmetic number, because the mean of its divisors is an integer number (4318470061).

Almost surely, 2^8636940121 is an apocalyptic number.

It is an amenable number.

8636940121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8636940121 is an equidigital number, since it uses as much as digits as its factorization.

8636940121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 8636940121 is about 92935.1393230784. The cubic root of 8636940121 is about 2051.7288703967.

The spelling of 8636940121 in words is "eight billion, six hundred thirty-six million, nine hundred forty thousand, one hundred twenty-one".