7882181 has 2 divisors, whose sum is σ = 7882182. Its totient is φ = 7882180.

The previous prime is 7882177. The next prime is 7882183. The reversal of 7882181 is 1812887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7480225 + 401956 = 2735^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 7882181 - 2² = 7882177 is a prime.

It is a super-2 number, since 2×7882181² = 124257554633522, which contains 22 as substring.

Together with 7882183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7882183) 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, 3941090 + 3941091.

It is an arithmetic number, because the mean of its divisors is an integer number (3941091).

Almost surely, 2^7882181 is an apocalyptic number.

It is an amenable number.

7882181 is a deficient number, since it is larger than the sum of its proper divisors (1).

7882181 is an equidigital number, since it uses as much as digits as its factorization.

7882181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 35.

The square root of 7882181 is about 2807.5222171872. The cubic root of 7882181 is about 199.0133152711.

The spelling of 7882181 in words is "seven million, eight hundred eighty-two thousand, one hundred eighty-one".