8641819 has 2 divisors, whose sum is σ = 8641820. Its totient is φ = 8641818.

The previous prime is 8641817. The next prime is 8641873. The reversal of 8641819 is 9181468.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8641819 - 2¹ = 8641817 is a prime.

It is a super-2 number, since 2×8641819² = 149362071257522, which contains 22 as substring.

Together with 8641817, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8641817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4320909 + 4320910.

It is an arithmetic number, because the mean of its divisors is an integer number (4320910).

Almost surely, 2^8641819 is an apocalyptic number.

8641819 is a deficient number, since it is larger than the sum of its proper divisors (1).

8641819 is an equidigital number, since it uses as much as digits as its factorization.

8641819 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 8641819 is about 2939.6970932394. The cubic root of 8641819 is about 205.2115128049.

It can be divided in two parts, 86 and 41819, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 8641819 in words is "eight million, six hundred forty-one thousand, eight hundred nineteen".