41681891 has 2 divisors, whose sum is σ = 41681892. Its totient is φ = 41681890.

The previous prime is 41681873. The next prime is 41681917. The reversal of 41681891 is 19818614.

41681891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41681891 - 2¹⁸ = 41419747 is a prime.

It is not a weakly prime, because it can be changed into another prime (41681821) 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, 20840945 + 20840946.

It is an arithmetic number, because the mean of its divisors is an integer number (20840946).

Almost surely, 2^41681891 is an apocalyptic number.

41681891 is a deficient number, since it is larger than the sum of its proper divisors (1).

41681891 is an equidigital number, since it uses as much as digits as its factorization.

41681891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 38.

The square root of 41681891 is about 6456.1514077661. The cubic root of 41681891 is about 346.7228558864.

The spelling of 41681891 in words is "forty-one million, six hundred eighty-one thousand, eight hundred ninety-one".