9863445121 has 2 divisors, whose sum is σ = 9863445122. Its totient is φ = 9863445120.

The previous prime is 9863445107. The next prime is 9863445131. The reversal of 9863445121 is 1215443689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8754222096 + 1109223025 = 93564^2 + 33305^2 .

It is a cyclic number.

It is not a de Polignac number, because 9863445121 - 2⁷ = 9863444993 is a prime.

It is not a weakly prime, because it can be changed into another prime (9863445131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4931722560 + 4931722561.

It is an arithmetic number, because the mean of its divisors is an integer number (4931722561).

Almost surely, 2^9863445121 is an apocalyptic number.

It is an amenable number.

9863445121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9863445121 is an equidigital number, since it uses as much as digits as its factorization.

9863445121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 9863445121 is about 99314.8786486698. The cubic root of 9863445121 is about 2144.5830912740.

The spelling of 9863445121 in words is "nine billion, eight hundred sixty-three million, four hundred forty-five thousand, one hundred twenty-one".