8543641 has 2 divisors, whose sum is σ = 8543642. Its totient is φ = 8543640.

The previous prime is 8543617. The next prime is 8543651. The reversal of 8543641 is 1463458.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5198400 + 3345241 = 2280^2 + 1829^2 .

It is a cyclic number.

It is not a de Polignac number, because 8543641 - 2⁵ = 8543609 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (8543651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4271820 + 4271821.

It is an arithmetic number, because the mean of its divisors is an integer number (4271821).

Almost surely, 2^8543641 is an apocalyptic number.

It is an amenable number.

8543641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8543641 is an equidigital number, since it uses as much as digits as its factorization.

8543641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 8543641 is about 2922.9507351305. The cubic root of 8543641 is about 204.4314286789.

The spelling of 8543641 in words is "eight million, five hundred forty-three thousand, six hundred forty-one".