41982781 has 2 divisors, whose sum is σ = 41982782. Its totient is φ = 41982780.

The previous prime is 41982763. The next prime is 41982821. The reversal of 41982781 is 18728914.

It is a happy number.

It is an a-pointer prime, because the next prime (41982821) can be obtained adding 41982781 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40119556 + 1863225 = 6334^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 41982781 - 2⁷ = 41982653 is a prime.

It is a super-2 number, since 2×41982781² = 3525107800987922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41982181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20991390 + 20991391.

It is an arithmetic number, because the mean of its divisors is an integer number (20991391).

Almost surely, 2^41982781 is an apocalyptic number.

It is an amenable number.

41982781 is a deficient number, since it is larger than the sum of its proper divisors (1).

41982781 is an equidigital number, since it uses as much as digits as its factorization.

41982781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 40.

The square root of 41982781 is about 6479.4120875277. The cubic root of 41982781 is about 347.5551550567. Note that the first 3 decimals are identical.

The spelling of 41982781 in words is "forty-one million, nine hundred eighty-two thousand, seven hundred eighty-one".