8123663189 has 2 divisors, whose sum is σ = 8123663190. Its totient is φ = 8123663188.

The previous prime is 8123663183. The next prime is 8123663221. The reversal of 8123663189 is 9813663218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5724132964 + 2399530225 = 75658^2 + 48985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8123663189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8123663183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4061831594 + 4061831595.

It is an arithmetic number, because the mean of its divisors is an integer number (4061831595).

Almost surely, 2^8123663189 is an apocalyptic number.

It is an amenable number.

8123663189 is a deficient number, since it is larger than the sum of its proper divisors (1).

8123663189 is an equidigital number, since it uses as much as digits as its factorization.

8123663189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 8123663189 is about 90131.3662883238. The cubic root of 8123663189 is about 2010.2526178539.

The spelling of 8123663189 in words is "eight billion, one hundred twenty-three million, six hundred sixty-three thousand, one hundred eighty-nine".