8182861 has 2 divisors, whose sum is σ = 8182862. Its totient is φ = 8182860.

The previous prime is 8182859. The next prime is 8182877. The reversal of 8182861 is 1682818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7733961 + 448900 = 2781^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 8182861 - 2¹ = 8182859 is a prime.

Together with 8182859, it forms a pair of twin primes.

8182861 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8182891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4091430 + 4091431.

It is an arithmetic number, because the mean of its divisors is an integer number (4091431).

Almost surely, 2^8182861 is an apocalyptic number.

It is an amenable number.

8182861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8182861 is an equidigital number, since it uses as much as digits as its factorization.

8182861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 34.

The square root of 8182861 is about 2860.5700480848. The cubic root of 8182861 is about 201.5123764274.

The spelling of 8182861 in words is "eight million, one hundred eighty-two thousand, eight hundred sixty-one".