863008121 has 2 divisors, whose sum is σ = 863008122. Its totient is φ = 863008120.

The previous prime is 863008103. The next prime is 863008141. The reversal of 863008121 is 121800368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820249600 + 42758521 = 28640^2 + 6539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863008121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (863008141) 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, 431504060 + 431504061.

It is an arithmetic number, because the mean of its divisors is an integer number (431504061).

Almost surely, 2^863008121 is an apocalyptic number.

It is an amenable number.

863008121 is a deficient number, since it is larger than the sum of its proper divisors (1).

863008121 is an equidigital number, since it uses as much as digits as its factorization.

863008121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 863008121 is about 29376.9998638391. Note that the first 3 decimals coincide. The cubic root of 863008121 is about 952.0760217667.

Adding to 863008121 its reverse (121800368), we get a palindrome (984808489).

The spelling of 863008121 in words is "eight hundred sixty-three million, eight thousand, one hundred twenty-one".