8018861 has 2 divisors, whose sum is σ = 8018862. Its totient is φ = 8018860.

The previous prime is 8018851. The next prime is 8018887. The reversal of 8018861 is 1688108.

It is a happy number.

8018861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6405961 + 1612900 = 2531^2 + 1270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8018861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8018851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4009430 + 4009431.

It is an arithmetic number, because the mean of its divisors is an integer number (4009431).

Almost surely, 2^8018861 is an apocalyptic number.

It is an amenable number.

8018861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8018861 is an equidigital number, since it uses as much as digits as its factorization.

8018861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 8018861 is about 2831.7593471197. The cubic root of 8018861 is about 200.1570516416.

The spelling of 8018861 in words is "eight million, eighteen thousand, eight hundred sixty-one".