8543861 has 2 divisors, whose sum is σ = 8543862. Its totient is φ = 8543860.

The previous prime is 8543839. The next prime is 8543881. The reversal of 8543861 is 1683458.

8543861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 1705636 = 2615^2 + 1306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8543861 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 (8543831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4271930 + 4271931.

It is an arithmetic number, because the mean of its divisors is an integer number (4271931).

Almost surely, 2^8543861 is an apocalyptic number.

It is an amenable number.

8543861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8543861 is an equidigital number, since it uses as much as digits as its factorization.

8543861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 8543861 is about 2922.9883680918. The cubic root of 8543861 is about 204.4331833769.

The spelling of 8543861 in words is "eight million, five hundred forty-three thousand, eight hundred sixty-one".