863161289 has 2 divisors, whose sum is σ = 863161290. Its totient is φ = 863161288.

The previous prime is 863161283. The next prime is 863161297. The reversal of 863161289 is 982161368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685392400 + 177768889 = 26180^2 + 13333^2 .

It is a cyclic number.

It is not a de Polignac number, because 863161289 - 2¹² = 863157193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (863161283) 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, 431580644 + 431580645.

It is an arithmetic number, because the mean of its divisors is an integer number (431580645).

Almost surely, 2^863161289 is an apocalyptic number.

It is an amenable number.

863161289 is a deficient number, since it is larger than the sum of its proper divisors (1).

863161289 is an equidigital number, since it uses as much as digits as its factorization.

863161289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 863161289 is about 29379.6066855906. The cubic root of 863161289 is about 952.1323437372.

The spelling of 863161289 in words is "eight hundred sixty-three million, one hundred sixty-one thousand, two hundred eighty-nine".