8141981 has 2 divisors, whose sum is σ = 8141982. Its totient is φ = 8141980.

The previous prime is 8141971. The next prime is 8141993. The reversal of 8141981 is 1891418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5597956 + 2544025 = 2366^2 + 1595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8141981 is a prime.

It is a super-2 number, since 2×8141981² = 132583709208722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8141911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4070990 + 4070991.

It is an arithmetic number, because the mean of its divisors is an integer number (4070991).

Almost surely, 2^8141981 is an apocalyptic number.

It is an amenable number.

8141981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8141981 is an equidigital number, since it uses as much as digits as its factorization.

8141981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 32.

The square root of 8141981 is about 2853.4156724880. The cubic root of 8141981 is about 201.1762436923.

The spelling of 8141981 in words is "eight million, one hundred forty-one thousand, nine hundred eighty-one".