8189641 has 2 divisors, whose sum is σ = 8189642. Its totient is φ = 8189640.

The previous prime is 8189639. The next prime is 8189663. The reversal of 8189641 is 1469818.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4822416 + 3367225 = 2196^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 8189641 - 2¹ = 8189639 is a prime.

Together with 8189639, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8189641.

It is not a weakly prime, because it can be changed into another prime (8189681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094820 + 4094821.

It is an arithmetic number, because the mean of its divisors is an integer number (4094821).

Almost surely, 2^8189641 is an apocalyptic number.

It is an amenable number.

8189641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189641 is an equidigital number, since it uses as much as digits as its factorization.

8189641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 8189641 is about 2861.7548811874. The cubic root of 8189641 is about 201.5680161662.

The spelling of 8189641 in words is "eight million, one hundred eighty-nine thousand, six hundred forty-one".